Significantly Poorer Performance in AIR 2.0 vs 1.5.X
The company I work for has a demonstration Adobe AIR application that we distribute to customers. We have not tested it under AIR 2.0 until today but after updating the frame-rate has degraded substantially from the 1.5.X releases. We tried recompiling with the latest SDKs but no luck in improving the poor performance. We are now dreading our customers upgrading to AIR 2.0. We will of course try digging deeper and solving the problem but I'd be happy to share the installer with anyone from the Adobe team if they would like to have a look at it since AIR 2.0 was meant to be out of the box faster.
I have the same problem with my application - ironically dropping the frame of my application (from 60fps to 30 fps) has the effect that it runs faster under air 2.0!
Wierd.
I hope you guys at Adobe can fix this.
Regards, Mark.
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Poor performance and high number of gets on seemingly simple insert/select
Versions & config:
Database : 10.2.0.4.0
Application : Oracle E-Business Suite 11.5.10.2
2 node RAC, IBM AIX 5.3Here's the insert / select which I'm struggling to explain why it's taking 6 seconds, and why it needs to get > 24,000 blocks:
INSERT INTO WF_ITEM_ATTRIBUTE_VALUES ( ITEM_TYPE, ITEM_KEY, NAME, TEXT_VALUE,
NUMBER_VALUE, DATE_VALUE ) SELECT :B1 , :B2 , WIA.NAME, WIA.TEXT_DEFAULT,
WIA.NUMBER_DEFAULT, WIA.DATE_DEFAULT FROM WF_ITEM_ATTRIBUTES WIA WHERE
WIA.ITEM_TYPE = :B1
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 4 0
Execute 2 3.44 6.36 2 24297 198 36
Fetch 0 0.00 0.00 0 0 0 0
total 3 3.44 6.36 2 24297 202 36
Misses in library cache during parse: 1
Misses in library cache during execute: 2Also from the tkprof output, the explain plan and waits - virtually zero waits:
Rows Execution Plan
0 INSERT STATEMENT MODE: ALL_ROWS
0 TABLE ACCESS MODE: ANALYZED (BY INDEX ROWID) OF 'WF_ITEM_ATTRIBUTES' (TABLE)
0 INDEX MODE: ANALYZED (RANGE SCAN) OF 'WF_ITEM_ATTRIBUTES_PK' (INDEX (UNIQUE))
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
library cache lock 12 0.00 0.00
gc current block 2-way 14 0.00 0.00
db file sequential read 2 0.01 0.01
row cache lock 24 0.00 0.01
library cache pin 2 0.00 0.00
rdbms ipc reply 1 0.00 0.00
gc cr block 2-way 4 0.00 0.00
gc current grant busy 1 0.00 0.00
********************************************************************************The statement was executed 2 times. I know from slicing up the trc file that :
exe #1 : elapsed = 0.02s, query = 25, current = 47, rows = 11
exe #2 : elapsed = 6.34s, query = 24272, current = 151, rows = 25
If I run just the select portion of the statement, using bind values from exe #2, I get small number of gets (< 10), and < 0.1 secs elapsed.
If I make the insert into an empty, non-partitioned table, I get :
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.01 0.08 0 137 53 25
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.01 0.08 0 137 53 25and same explain plan - using index range scan on WF_Item_Attributes_PK.
This problem is part of testing of a database upgrade and country go-live. On a 10.2.0.3 test system (non-RAC), the same insert/select - using the real WF_Item_Attributes_Value table takes :
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.10 10 27 136 25
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.10 10 27 136 25So I'm struggling to understand why the performance on the 10.2.0.4 RAC system is so much worse for this query, and why it's doing so many gets. Suggestions, thoughts, ideas welcomed.
I've verified system level things - CPUs weren't/aren't max'd out, no significant paging/swapping activity, run queue not long. AWR report for the time period shows nothing unusual.
further info on the objects concerned:
query source table :
WF_Item_Attributes_PK : unique index on Item_Type, Name. Index has 144 blocks, non-partitioned
WF_Item_Attributes tbl : non-partitioned, 160 blocks
insert destination table:
WF_Item_Attribute_Values:
range partitioned on Item_Type, and hash sub-partitioned on Item_Key
both executions of the insert hit the partition with the most data : 127,691 blocks total ; 8 sub-partitions with 15,896 to 16,055 blocks per sub-partition.
WF_Item_Attribute_Values_PK : unique index on columns Item_Type, Item_Key, Name. Range/hash partitioned as per table.
Bind values:
exe #1 : Item_Type (:B1) = OEOH, Item_Key (:B2) = 1048671
exe #2 : Item_Type (:B1) = OEOL, Item_Key (:B2) = 4253168
number of rows in WF_Item_Attribute_Values for Item_Type = OEOH : 1132587
number of rows in WF_Item_Attribute_Values for Item_Type = OEOL : 18763670
The non-RAC 10.2.0.3 test system (clone of Production from last night) has higher row counts for these 2.
thanks and regards
Ivanhi Sven,
Thanks for your input.
1) I guess so, but I haven't lifted the lid to delve inside the form as to which one. I don't think it's the cause though, as I got poor performance running the insert statement with my own value (same statement, using my own bind value).
2) In every execution plan I've seen, checked, re-checked, it uses a range scan on the primary key. It is the most efficient I think, but the source table is small in any case - table 160 blocks, PK index 144 blocks. So I think it's the partitioned destination table that's the problem - but we only see this issue on the 10.2.0.4 pre-production (RAC) system. The 10.2.0.3 (RAC) Production system doesn't have it. This is why it's so puzzling to me - the source table read is fast, and does few gets.
3) table storage details below - the Item_Types being used were 'OEOH' (fast execution) and 'OEOL' (slow execution). Both hit partition WF_ITEM49, hence I've only expanded the subpartition info for that one (there are over 600 sub-partitions).
============= From DBA_Part_Tables : Partition Type / Count =============
PARTITI SUBPART PARTITION_COUNT DEF_TABLESPACE_NAME
RANGE HASH 77 APPS_TS_TX_DATA
1 row selected.
============= From DBA_Tab_Partitions : Partition Names / Tablespaces =============
Partition Name TS Name High Value High Val Len
WF_ITEM1 APPS_TS_TX_DATA 'A1' 4
WF_ITEM2 APPS_TS_TX_DATA 'AM' 4
WF_ITEM3 APPS_TS_TX_DATA 'AP' 4
WF_ITEM47 APPS_TS_TX_DATA 'OB' 4
WF_ITEM48 APPS_TS_TX_DATA 'OE' 4
WF_ITEM49 APPS_TS_TX_DATA 'OF' 4
WF_ITEM50 APPS_TS_TX_DATA 'OK' 4
WF_ITEM75 APPS_TS_TX_DATA 'WI' 4
WF_ITEM76 APPS_TS_TX_DATA 'WS' 4
WF_ITEM77 APPS_TS_TX_DATA MAXVALUE 8
77 rows selected.
============= From dba_part_key_columns : Partition Columns =============
NAME OBJEC Column Name COLUMN_POSITION
WF_ITEM_ATTRIBUTE_VALUES TABLE ITEM_TYPE 1
1 row selected.
PPR1 sql> @q_tabsubpart wf_item_attribute_values WF_ITEM49
============= From DBA_Tab_SubPartitions : SubPartition Names / Tablespaces =============
Partition Name SUBPARTITION_NAME TS Name High Value High Val Len
WF_ITEM49 SYS_SUBP3326 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3328 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3332 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3331 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3330 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3329 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3327 APPS_TS_TX_DATA 0
WF_ITEM49 SYS_SUBP3325 APPS_TS_TX_DATA 0
8 rows selected.
============= From dba_part_key_columns : Partition Columns =============
NAME OBJEC Column Name COLUMN_POSITION
WF_ITEM_ATTRIBUTE_VALUES TABLE ITEM_KEY 1
1 row selected.
from DBA_Segments - just for partition WF_ITEM49 :
Segment Name TSname Partition Name Segment Type BLOCKS Mbytes EXTENTS Next Ext(Mb)
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3332 TblSubPart 16096 125.75 1006 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3331 TblSubPart 16160 126.25 1010 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3330 TblSubPart 16160 126.25 1010 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3329 TblSubPart 16112 125.875 1007 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3328 TblSubPart 16096 125.75 1006 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3327 TblSubPart 16224 126.75 1014 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3326 TblSubPart 16208 126.625 1013 .125
WF_ITEM_ATTRIBUTE_VALUES @TX_DATA SYS_SUBP3325 TblSubPart 16128 126 1008 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3332 IdxSubPart 59424 464.25 3714 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3331 IdxSubPart 59296 463.25 3706 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3330 IdxSubPart 59520 465 3720 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3329 IdxSubPart 59104 461.75 3694 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3328 IdxSubPart 59456 464.5 3716 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3327 IdxSubPart 60016 468.875 3751 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3326 IdxSubPart 59616 465.75 3726 .125
WF_ITEM_ATTRIBUTE_VALUES_PK @TX_IDX SYS_SUBP3325 IdxSubPart 59376 463.875 3711 .125
sum 4726.5
[the @ in the TS Name is my shortcode, as Apps stupidly prefixes every ts with "APPS_TS_"]
The Tablespaces used for all subpartitions are UNIFORM extent mgmt, AUTO segment_space_management ; LOCAL extent mgmt.regards
Ivan -
Poor performance with WebI and BW hierarchy drill-down...
Hi
We are currently implementing a large HR solution with BW as backend
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very poor performance when doing drill-down in WebI on a BW hierarchy.
In general we are experiencing ok performance during selection of data
and traditional WebI filtering - however when using the BW hierarchy
for navigation within WebI, response times are significantly increasing.
The general solution setup are as follows:
1) Business Content version of the personnel administration
infoprovider - 0PA_C01. The Infoprovider contains 30.000 records
2) Multiprovider to act as semantic Data Mart layer in BW.
3) Bex Query to act as Data Mart Query and metadata exchange for BOE.
All key figure restrictions and calculations are done in this Data Mart
Query.
4) Traditionel BO OLAP universe 1:1 mapped to Bex Data Mart query. No
calculations etc. are done in the universe.
5) WebI report with limited objects included in the WebI query.
As we are aware that performance is an very subjective issues we have
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Furthermore we have tried to apply various traditional BW performance
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That is each navigational step takes 15-20 seconds
with only 1000 records in the WebI cache when using drill-down on org.
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there any ways to get around them ?.
As an alternative we are currently considering changing our reporting
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division and their need to navigate the WebI dataset without
limitations which makes this issue critical.
Hope that you are able to help.
Thanks in advance
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Edited by: Mads Frank on Feb 1, 2010 9:41 PMHi Henry, thank you for your suggestions although i´m not agree with you that 20 seconds is pretty good for that navigation step. The same query executed with BEx Analyzer takes only 1-2 seconds to do the drill down.
Actions
suppress unassigned nodes in RSH1: Magic!! This was the main problem!!
tick use structure elements in RSRT: Done it.
enable query stripping in WebI: Done it.
upgrade your BW to SP09: Has the SP09 some inprovements in relation to this point ?
use more runtime query filters. : Not possible. Very simple query.
Others:
RSRT combination H-1-3-3-1 (Expand nodes/Permanent Cache BLOB)
Uncheck prelimirary Hierarchy presentation in Query. only selected.
Check "Use query drill" in webi properties.
Sorry for this mixed message but when i was answering i tryied what you suggest in relation with supress unassigned nodes and it works perfectly. This is what is cusing the bottleneck!! incredible...
Thanks a lot
J.Casas -
ITunes 5 poor performance in mini player view
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I can only attribute this behavior to the new "skin," but is anyone else seeing poor performance from iTunes 5 in the mini player view?No, I just downloaded iTunes 5 a few days ago and I don't have any add-ons. I should clarify that this is on my 867MHz Powerbook G4.
I've been observing the CPU usage some more, and it seems to take a huge hit with songs/labels that are very long; i.e.: ones that scroll sideways across the yellow display on the second line. I've noticed this behavior with Podcasts--the Podcast name will be short and will not scroll, then it's description will roll up and will be long enough to require sideways scrolling. The poor performance comes only whin scrolling titles are being displayed, consuming 45-65% CPU.
Playing music with short artist and album names consumes 10-15% CPU continuously, with spikes to 35% when the artist/album rolls upwards on the yellow display window. If sideways scrolling is displayed, again CPU usage stays high.
If iTunes 5 is in mini player mode and not playing anything (only the Mac logo in the yellow window), then continuous CPU usage is <1%.
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Poor performance of CMP entity bean finder that uses unicode notation N''
I am using Weblogic 6.1 with SQL Server 2000. I have an entity bean
with a finder method that does a lookup based on a (indexed) varchar
field. I noticed during testing that the performance of this finder
method was much worse than other finders. I did some profiling of the
SQL calls going from the Weblogic container to the database, and
noticed that the query generated for the finder call used the unicode
notation, which seems to result in very poor performance. If you run
the following two queries through SQL Analyzer (or SQL Profiler),
you'll notice a significant performance hit on the query that uses the
unicode notation:
example of generated SQL:
SELECT WL0.field1, WL0.field2 ... FROM tblAccount WL0 WHERE
WL0.accountId = N'40879'
example of desired SQL:
SELECT WL0.field1, WL0.field2 ... FROM tblAccount WL0 WHERE
WL0.accountId = '40879'
Is there any way to force it to generate the SQL without using the
notation with the unicode 'N'?
Thanks for any help,
DonDon wrote:
That worked (we use the Weblogic JDBC driver). The performance is MUCH
better! Glad to help.
Is there some place in the documentation where I should have
seen this (ie. where can I find the documentation on other possibly
useful connection properties)?It should be documented in the jdbc driver documents...
Joe
>
Thanks,
Don Tranquillo
Joe Weinstein wrote:
Hi. The driver does this to ensure that any 16-bit character string
that Java has,
is absorbed unaltered into the DBMS. There is no way to know a-priori
whether
the DBMS needs/wants an nvarchar datum or an 8-bit varchar datum. As
you see,
there is a big performance issue. You can tell the jdbc driver to
send data
as 8-bit (without the "N'" prefix) by setting a connection property:
If you are using the weblogic mssqlserver driver, add the
useVarChars=true
property. If you are using the MS free driver or the DataDirect driver,
add a property sendStringParametersAsUnicode=false.
Joe
Don wrote:
I am using Weblogic 6.1 with SQL Server 2000. I have an entity bean
with a finder method that does a lookup based on a (indexed) varchar
field. I noticed during testing that the performance of this finder
method was much worse than other finders. I did some profiling of the
SQL calls going from the Weblogic container to the database, and
noticed that the query generated for the finder call used the unicode
notation, which seems to result in very poor performance. If you run
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you'll notice a significant performance hit on the query that uses the
unicode notation:
example of generated SQL:
SELECT WL0.field1, WL0.field2 ... FROM tblAccount WL0 WHERE
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example of desired SQL:
SELECT WL0.field1, WL0.field2 ... FROM tblAccount WL0 WHERE
WL0.accountId = '40879'
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WAD-Analysis Item-Poor performance for new lines
Hi.
I use WAD7 for entering new records in IP.
According to our business requirements, in analysis item properties I have defined "Number of New Lines in Planning Queries" = 50.
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I setup zfs with sharenfs on my solaris box and i'm having a very poor performance with nfs (about 1-3MB/s).
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The write performance of NFS/ZFS has been known to suck for a long time.
First make sure your running the latest solaris version (10U4) or a recent recommended patch set.
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This is discussed a little here
and
here
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Anyway maybe can try the solution that the "best practices" suggests ie using a local drive as an intent log.
If that doesnt work, try setting zil_disable (�set zfs:zil_disable=1′ to /etc/system).
You will have to weigh the significance of the purported reliability issues of that solution for yourself.
Basically what it comes down to is that if your nfs server crashes and the client doesnt, but keeps cheerfully writing away. Then some of what it wrote maybe lost. Even silently a part in the middle.
One other thing to check, the storage isn't coming off a SAN is it?
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Apple maps has received a poor performance rating just after introduction of the iPhone 5. I am running Google Maps app on the phone. SIRI cannot seem to get me to a specific address. Where does the problem lie? Also can anyone tell me the hierarchy of use between the Apple Maps, SIRI, and Google maps when the app is on the phone? How do you choose one over the other as the default map usage? Or better still how do you suppress SIRI from using the Apple maps app when requesting a "go to"?
I have placed an address location into the CONTACTS list and when I ask SIRI to "take me there" it found a TOTALLY different location in the metro area with the same street name. I have included the address, the quadrant, (NE) and the ZIP code into the CONTACTS list. As it turns out, no amount of canceling the trip or relocating the address in the CONTACTS list line would prevent SIRI from taking me to this bogus location. FINALLY I typed in Northeast for NE in the CONTACTS list (NE being the accepted method of defining the USPS location quadrant) , canceled the current map route and it finally found the correct address. This problem would normally not demand such a response from me to have it fixed but the address is one of a hospital in the center of town and this hospital HAS a branch location in a similar part of town (NOT the original address SIRI was trying to take me to). This screw up could be dangerous if not catastrophic to someone who was looking for a hospital location fast and did not know of these two similar locations. After all the whole POINT of directions is not just whimsical pasttime or convenience. In a pinch people need to rely on this function. OR, are my expectations set too high?
How does the iPhone select between one app or the other (Apple Maps or Gppgle Maps) as it relates to SIRI finding and showing a map route?
Why does SIRI return an address that is NOT the correct address nor is the returned location in the requested ZIP code?
Is there a known bug in the CONTACTS list that demands the USPS quadrant ID be spelled out, as opposed to abreviated, to permit SIRI to do its routing?
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-
General poor performance of my Mac mini
I have been using my mac mini for over a year, it continues to frustrate me how slow and unresponsive it can be even though I do very little with it, i.e organise photos and browse the web - usually looking for solutions to the poor performance problem!
I came a cross this app that has given me lots of information, unfortunately with my limited IT know-how there is nothing here that gives me any clues, as to the cause of the problem. I guess the red font is not good?
I'm sorry i can't be more specific about the problem other than to say that iPhoto and Safari the two programmes i use way more often than any other, keep giving me the beach ball. My internet speed is ok 25 Mbps down - 4.5 Mbps
Is there anything here that stands out as being wrong? if so any suggestions/ instructions for what I should do?
p.s. i had to quit Safari while writing this and have a report for this if it helps?
Any help much appreciated.
Problem description:
My mac is just generally very slow. I only use it to look at the internet and manage photos.
EtreCheck version: 2.1.5 (108)
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Backup size 2.00 TB > (Disk used 240.33 GB X 3)
Top Processes by CPU: ℹ️
110% com.apple.WebKit.Plugin.64
6% WindowServer
1% Activity Monitor
1% coreaudiod
1% sysmond
Top Processes by Memory: ℹ️
1.11 GB com.apple.WebKit.Plugin.64
73 MB iTunes
49 MB com.apple.WebKit.WebContent
39 MB mds
39 MB WindowServer
Virtual Memory Information: ℹ️
68 MB Free RAM
1.07 GB Active RAM
1.02 GB Inactive RAM
893 MB Wired RAM
63.93 GB Page-ins
2.15 GB Page-outs
Diagnostics Information: ℹ️
Jan 1, 2015, 11:43:39 AM /Library/Logs/DiagnosticReports/com.apple.WebKit.Plugin.64_2015-01-01-114339_[r edacted].cpu_resource.diag [Details]
Jan 1, 2015, 11:32:46 AM /Library/Logs/DiagnosticReports/WindowServer_2015-01-01-113246_[redacted].crash
Jan 1, 2015, 11:00:30 AM /Library/Logs/DiagnosticReports/com.apple.WebKit.Plugin.64_2015-01-01-110030_[r edacted].cpu_resource.diag [Details]
Jan 1, 2015, 10:19:03 AM /Library/Logs/DiagnosticReports/iBooks_2015-01-01-101903_[redacted].cpu_resourc e.diag [Details]Hi Linc Davis
Thank you for taking the time to respond.
I got this information from a time when I was opening up iPhoto, and then going to the iCloud folder. To be honest it wasn't the most disastrous of events, I did get a few beachballs and when I opened up a shared folder the photos weren't loaded as normal. As I get more lengthy delays in carrying out any activities I will post back the console results.
Just as a bit more info, I don't consider my problem an update to Yosemite problem, if anything since updating performance has been improved from Mavericks.
Do you have any comments about upgrading RAM from the 4GB I have?
Should I act on any of the messages in red from the EtreCheck report?
Many Thanks
Duncan
03/01/2015 19:30:18.331 com.apple.iCloudHelper[12481]: objc[12481]: Class FALogging is implemented in both /System/Library/PrivateFrameworks/FamilyCircle.framework/Versions/A/FamilyCircl e and /System/Library/PrivateFrameworks/FamilyNotification.framework/Versions/A/Famil yNotification. One of the two will be used. Which one is undefined.
03/01/2015 19:30:18.391 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.
03/01/2015 19:30:19.162 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:30:19.162 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:30:19.163 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:30:19.163 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:30:19.186 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:30:19.187 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:30:19.188 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:30:19.188 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:30:19.188 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:30:19.188 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:30:25.446 WindowServer[7810]: common_reenable_update: UI updates were finally reenabled by application "iPhoto" after 10.70 seconds (server forcibly re-enabled them after 1.00 seconds)
03/01/2015 19:30:33.548 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:30:33.919 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:30:34.077 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:30:34.605 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:30:34.774 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:30:34.853 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:30:47.562 pkd[12123]: FCIsAppAllowedToLaunchExt [343] -- *** _FCMIGAppCanLaunch timed out. Returning false.
03/01/2015 19:31:10.695 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:31:10.807 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:31:16.961 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:31:18.514 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:31:18.593 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:31:22.538 discoveryd[49]: Basic Sockets SetDelegatePID() failed for PID[3491] errno[3] result[-1]
03/01/2015 19:31:27.912 mds[32]: (DiskStore.Normal:2376) 6052001 1.780097
03/01/2015 19:31:56.831 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:31:57.224 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:31:57.281 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:31:57.405 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:31:58.507 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:31:58.541 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:31:59.160 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:32:09.891 com.apple.InputMethodKit.UserDictionary[12456]: -[PFUbiquitySetupAssistant canReadFromUbiquityRootLocation:](1492): CoreData: Ubiquity: Error attempting to read ubiquity root url: file:///Users/Duncan/Library/Mobile%20Documents/com~apple~TextInput/Dictionarie s/.
Error: Error Domain=NSCocoaErrorDomain Code=134323 "The operation couldn’t be completed. (Cocoa error 134323.)" UserInfo=0x7f90e152a380 {NSAffectedObjectsErrorKey=<PFUbiquityLocation: 0x7f90e152a2e0>: /Users/Duncan/Library/Mobile Documents/com~apple~TextInput}
userInfo: {
NSAffectedObjectsErrorKey = "<PFUbiquityLocation: 0x7f90e152a2e0>: /Users/Duncan/Library/Mobile Documents/com~apple~TextInput";
03/01/2015 19:32:12.862 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:32:20.818 com.apple.SecurityServer[53]: Killing auth hosts
03/01/2015 19:32:20.819 com.apple.SecurityServer[53]: Session 100281 destroyed
03/01/2015 19:32:20.974 com.apple.SecurityServer[53]: Session 100577 created
03/01/2015 19:32:34.833 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:32:35.767 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:32:35.789 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:32:35.980 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:32:36.273 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:32:36.487 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:32:47.035 WindowServer[7810]: disable_update_timeout: UI updates were forcibly disabled by application "iPhoto" for over 1.00 seconds. Server has re-enabled them.
03/01/2015 19:32:50.555 WindowServer[7810]: common_reenable_update: UI updates were finally reenabled by application "iPhoto" after 4.52 seconds (server forcibly re-enabled them after 1.00 seconds)
03/01/2015 19:32:51.578 WindowServer[7810]: disable_update_timeout: UI updates were forcibly disabled by application "iPhoto" for over 1.00 seconds. Server has re-enabled them.
03/01/2015 19:32:52.745 WindowServer[7810]: common_reenable_update: UI updates were finally reenabled by application "iPhoto" after 2.17 seconds (server forcibly re-enabled them after 1.00 seconds)
03/01/2015 19:32:53.098 mds[32]: (DiskStore.Normal:2376) 6052001 1.279589
03/01/2015 19:33:03.332 BezelServices 245.23[7816]: ASSERTION FAILED: dvcAddrRef != ((void *)0) -[DriverServices getDeviceAddress:] line: 2602
03/01/2015 19:33:03.332 BezelServices 245.23[7816]: ASSERTION FAILED: dvcAddrRef != ((void *)0) -[DriverServices getDeviceAddress:] line: 2602
03/01/2015 19:33:11.961 mds[32]: (DiskStore.Normal:2376) 6052001 1.939804
03/01/2015 19:33:29.541 WindowServer[7810]: disable_update_timeout: UI updates were forcibly disabled by application "iPhoto" for over 1.00 seconds. Server has re-enabled them.
03/01/2015 19:33:32.354 WindowServer[7810]: common_reenable_update: UI updates were finally reenabled by application "iPhoto" after 3.81 seconds (server forcibly re-enabled them after 1.00 seconds)
03/01/2015 19:33:44.549 discoveryd[49]: Basic DNSResolver dropping message because it doesn't match the one sent Port:53 MsgID:20602
03/01/2015 19:33:54.055 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:34:05.143 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.143 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.165 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.165 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.165 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.166 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:05.499 discoveryd[49]: WCFNameResolvesToAddr: called
03/01/2015 19:34:05.499 discoveryd[49]: WCFNameResolvesToAddr: entering
03/01/2015 19:34:07.001 discoveryd[49]: Basic Sockets SetDelegatePID() failed for PID[3491] errno[3] result[-1]
03/01/2015 19:34:13.809 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:34:13.821 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:34:14.124 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:34:14.766 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:34:14.867 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End)
03/01/2015 19:34:17.769 WindowServer[7810]: scrollPhase Ended (4), but previous was 4 (not Began)
03/01/2015 19:34:18.186 WindowServer[7810]: scrollPhase MayBegin (128), but previous was 1 (not 0, Cancelled or End)
03/01/2015 19:34:18.186 WindowServer[7810]: scrollPhase Began (1), but previous was 1 (not 0, MayBegin or End) -
Poor performance of the BDB cache
I'm experiencing incredibly poor performance of the BDB cache and wanted to share my experience, in case anybody has any suggestions.
Overview
Stone Steps maintains a fork of a web log analysis tool - the Webalizer (http://www.stonesteps.ca/projects/webalizer/). One of the problems with the Webalizer is that it maintains all data (i.e. URLs, search strings, IP addresses, etc) in memory, which puts a cap on the maximum size of the data set that can be analyzed. Naturally, BDB was picked as the fastest database to maintain analyzed data on disk set and produce reports by querying the database. Unfortunately, once the database grows beyond the cache size, overall performance goes down the drain.
Note that the version of SSW available for download does not support BDB in the way described below. I can make the source available for you, however, if you find your own large log files to analyze.
The Database
Stone Steps Webalizer (SSW) is a command-line utility and needs to preserve all intermediate data for the month on disk. The original approach was to use a plain-text file (webalizer.current, for those who know anything about SSW). The BDB database that replaced this plain text file consists of the following databases:
sequences (maintains record IDs for all other tables)
urls -primary database containing URL data - record ID (key), URL itself, grouped data, such as number of hits, transfer size, etc)
urls.values - secondary database that contains a hash of the URL (key) and the record ID linking it to the primary database; this database is used for value lookups)
urls.hits - secondary database that contains the number of hits for each URL (key) and the record ID to link it to the primary database; this database is used to order URLs in the report by the number of hits.
The remaining databases are here just to indicate the database structure. They are the same in nature as the two described above. The legend is as follows: (s) will indicate a secondary database, (p) - primary database, (sf) - filtered secondary database (using DB_DONOTINDEX).
urls.xfer (s), urls.entry (s), urls.exit (s), urls.groups.hits (sf), urls.groups.xfer (sf)
hosts (p), hosts.values (s), hosts.hits (s), hosts.xfer (s), hosts.groups.hits (sf), hosts.groups.xfer (sf)
downloads (p), downloads.values (s), downloads.xfer (s)
agents (p), agents.values (s), agents.values (s), agents.hits (s), agents.visits (s), agents.groups.visits (sf)
referrers (p), referrers.values (s), referrers.values (s), referrers.hits (s), referrers.groups.hits (sf)
search (p), search.values (s), search.hits (s)
users (p), users.values (s), users.hits (s), users.groups.hits (sf)
errors (p), errors.values (s), errors.hits (s)
dhosts (p), dhosts.values (s)
statuscodes (HTTP status codes)
totals.daily (31 days)
totals.hourly (24 hours)
totals (one record)
countries (a couple of hundred countries)
system (one record)
visits.active (active visits - variable length)
downloads.active (active downloads - variable length)
All these databases (49 of them) are maintained in a single file. Maintaining a single database file is a requirement, so that the entire database for the month can be renamed, backed up and used to produce reports on demand.
Database Size
One of the sample Squid logs I received from a user contains 4.4M records and is about 800MB in size. The resulting database is 625MB in size. Note that there is no duplication of text data - only nodes and such values as hits and transfer sizes are duplicated. Each record also contains some small overhead (record version for upgrades, etc).
Here are the sizes of the URL databases (other URL secondary databases are similar to urls.hits described below):
urls (p):
8192 Underlying database page size
2031 Overflow key/data size
1471636 Number of unique keys in the tree
1471636 Number of data items in the tree
193 Number of tree internal pages
577738 Number of bytes free in tree internal pages (63% ff)
55312 Number of tree leaf pages
145M Number of bytes free in tree leaf pages (67% ff)
2620 Number of tree overflow pages
16M Number of bytes free in tree overflow pages (25% ff)
urls.hits (s)
8192 Underlying database page size
2031 Overflow key/data size
2 Number of levels in the tree
823 Number of unique keys in the tree
1471636 Number of data items in the tree
31 Number of tree internal pages
201970 Number of bytes free in tree internal pages (20% ff)
45 Number of tree leaf pages
243550 Number of bytes free in tree leaf pages (33% ff)
2814 Number of tree duplicate pages
8360024 Number of bytes free in tree duplicate pages (63% ff)
0 Number of tree overflow pages
The Testbed
I'm running all these tests using the latest BDB (v4.6) built from the source on Win2K3 server (release version). The test machine is 1.7GHz P4 with 1GB of RAM and an IDE hard drive. Not the fastest machine, but it was able to handle a log file like described before at a speed of 20K records/sec.
BDB is configured in a single file in a BDB environment, using private memory, since only one process ever has access to the database).
I ran a performance monitor while running SSW, capturing private bytes, disk read/write I/O, system cache size, etc.
I also used a code profiler to analyze SSW and BDB performance.
The Problem
Small log files, such as 100MB, can be processed in no time - BDB handles them really well. However, once the entire BDB cache is filled up, the machine goes into some weird state and can sit in this state for hours and hours before completing the analysis.
Another problem is that traversing large primary or secondary databases is a really slow and painful process. It is really not that much data!
Overall, the 20K rec/sec quoted above drop down to 2K rec/sec. And that's all after most of the analysis has been done, just trying to save the database.
The Tests
SSW runs in two modes, memory mode and database mode. In memory mode, all data is kept in memory in SSW's own hash tables and then saved to BDB at the end of each run.
In memory mode, the entire BDB is dumped to disk at the end of the run. First, it runs fairly fast, until the BDB cache is filled up. Then writing (disk I/O) goes at a snail pace, at about 3.5MB/sec, even though this disk can write at about 12-15MB/sec.
Another problem is that the OS cache gets filled up, chewing through all available memory long before completion. In order to deal with this problem, I disabled the system cache using the DB_DIRECT_DB/LOG options. I could see OS cache left alone, but once BDB cache was filed up, processing speed was as good as stopped.
Then I flipped options and used DB_DSYNC_DB/LOG options to disable OS disk buffering. This improved overall performance and even though OS cache was filling up, it was being flushed as well and, eventually, SSW finished processing this log, sporting 2K rec/sec. At least it finished, though - other combinations of these options lead to never-ending tests.
In the database mode, stale data is put into BDB after processing every N records (e.g. 300K rec). In this mode, BDB behaves similarly - until the cache is filled up, the performance is somewhat decent, but then the story repeats.
Some of the other things I tried/observed:
* I tried to experiment with the trickle option. In all honesty, I hoped that this would be the solution to my problems - trickle some, make sure it's on disk and then continue. Well, trickling was pretty much useless and didn't make any positive impact.
* I disabled threading support, which gave me some performance boost during regular value lookups throughout the test run, but it didn't help either.
* I experimented with page size, ranging them from the default 8K to 64K. Using large pages helped a bit, but as soon as the BDB cached filled up, the story repeated.
* The Db.put method, which was called 73557 times while profiling saving the database at the end, took 281 seconds. Interestingly enough, this method called ReadFile function (Win32) 20000 times, which took 258 seconds. The majority of the Db.put time was wasted on looking up records that were being updated! These lookups seem to be the true problem here.
* I tried libHoard - it usually provides better performance, even in a single-threaded process, but libHoard didn't help much in this case.I have been able to improve processing speed up to
6-8 times with these two techniques:
1. A separate trickle thread was created that would
periodically call DbEnv::memp_trickle. This works
especially good on multicore machines, but also
speeds things up a bit on single CPU boxes. This
alone improved speed from 2K rec/sec to about 4K
rec/sec.Hello Stone,
I am facing a similar problem, and I too hope to resolve the same with memp_trickle. I had these queries.
1. what was the % of clean pages that you specified?
2. What duration were you clling this thread to call memp_trickle?
This would give me a rough idea about which to tune my app. Would really appreciate if you can answer these queries.
Regards,
Nishith.
>
2. Maintaining multiple secondary databases in real
time proved to be the bottleneck. The code was
changed to create secondary databases at the end of
the run (calling Db::associate with the DB_CREATE
flag), right before the reports are generated, which
use these secondary databases. This improved speed
from 4K rec/sec to 14K rec/sec. -
Story
I've been using arch for the past four months, dual booting with my old Windows XP. As I'm very fond of Flash games and make my own programs with a cross-platform language, I've found few problems with the migration. One of them was the Adobe Flash Player performance, which was stunningly bad. But everyone was saying that was normal, so I left it as is.
However, one special error always worried me: a seemingly randomly started siren sound coming from the motherboard speaker. Thinking it was a alarm about some fatal kernel error, I had been solving it mostly with reboots.
But then it happened. While playing a graphics intensive game on Windows quickly after rebooting from Arch, the same siren sound started. It felt like a slap across the face: it was not a kernel error, it was an motherboard overheat alarm.
The Problem
Since the computer was giving overheat signs, I started looking at things from another angle. I noticed that some tasks take unusually long times in Arch (i.e.: building things from source; Firefox / OpenOffice startup; any graphics intensive program), specially from the Flash Player.
A great example is the game Penguinz, that runs flawlessly in Windows but is unbearably slow in Arch. So slow that it alone caused said overheat twice. And trying to record another flash game's record using XVidCap things went so bad that the game halved the FPS and started ignoring key presses.
Tech Info
Dual Core 3.2 processor
1 gb RAM
256 mb Geforce FX 5500 video card
Running Openbox
Using proprietary NVIDIA driver
TL;DR: poor performance on some tasks. Flash Player is so slow that overheats CPU and makes me cry. It's fine on Windows.
Off the top of my head I can think up some reasons: bad video driver, unwanted background application messing up, known Flash Player performance problems and Actionscript Linux/Arch-only bug.
Where do you think is the problem?jwcxz wrote:Have you looked at your process table for any program with abnormal CPU usage? That seems like the logical place to start. You shouldn't be getting poor performance in anything with that system. I have a 2.0GHz Core 2 Duo and an Intel GMA 965 and I've never had any problems with Flash. It's much better than it used to be.
Pidgin scared me for a while because it froze for no apparent reason. After fixing this, the table contains this two guys here:
%CPU
Firefox: 80%~100%
X: 0~20%
Graphic intensive test, so I think the X usage is normal. It might be some oddity at the Firefox+Linux+Flash sum, maybe a conflict. I'll try another browser.
EDIT:
Did a Javascript benchmark to test both systems and browsers.
Windows XP + Firefox = 4361.4ms
Arch + Firefox = 5146.0ms
So, it's actually a lot slower without even taking Flash into account. If someone knows a platform-independent benchmark to test both systems completely, and not only the browser, feel free to point out.
I think that something is already wrong here and the lack of power saving systems only aggravated the problem, causing overheat.
EDIT2:
Browser performance fixed: migrated to Midori. Flash stills slower than on Windows, but now it's bearable. Pretty neat browser too, goes better with the Arch Way. It shouldn't fix the temperature, however.
Applied B's idea, but didn't test yet. I'm not into the mood of playing flash games for two straight hours today.
Last edited by BoppreH (2009-05-03 04:25:20) -
Invalid block count and poor performance
Hi - Can anyone help?
Running an early 2011 13' MBP on ML. For a year - 18 months I've noticed poor performance at times, consistently slow boot (sometimes 5 minutes to usable), occasional lockups and spotlight often reindexes itself and slows the system (much more than my previous MBP), I can't see anything that triggers it. I'm also getting recurring errors in Disk Utility of 'Invalid block count', every time I'll repair the disk (booting into recovery), but after a month of use the error will reappear. About three months ago I erased and reinstalled ML, some of my data was moved over in Time Machine but I didn't restore from it. The erase and reinstall hasn't made any difference and I'm still seeing the same issues. Hard disk SMART status appears to be fine.
Can anyone recommend any troubleshooting steps? I'm not sure what else to do, still under Applecare and was thinking maybe the HD isn't working correctly?
Cheers!Performance.
Activity Monitor – Monitor Performance Problems
Performance Guide
Why is my computer slow
Why your Mac runs slower than it should
Slow boot.
Startup - Slow Boot
Startup - Slow Boot (2)
Startup - Slow Boot (3)
Startup Issues - Resolve
Startup Issues - Resolve (2) -
Safari hangs and poor performance in MBPR (Mid 2012)
Safari hangs and poor performance in MBPR (Mid 2012)? OS X 10.10.2 is up to date
Please answer as many of the following questions as you can. You may already have answered some of them. In that case, there's no need to repeat the answers.
Back up all data before making any changes.
Have you restarted your router and your broadband device (if they're separate) since you first noticed the problem? If not, do that now and see whether there's any change.
If your browser is Safari, then from the Safari menu bar, select
Safari ▹ Preferences... ▹ Privacy ▹ Remove All Website Data
and confirm. If the Downloads button (with the icon of a downward-pointing arrow) is showing in the toolbar, click it and then click Clear in the box that appears. The download history will be removed. Any change?
If you're running OS X 10.9 or later, select the Advanced tab in the Preferences window and uncheck the box marked
Stop plug-ins to save power
Any change?
Quit and relaunch the browser. Any change?
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Are any other web browsers installed, and are they the same? What about other Internet applications, such as iTunes and the App Store?
If other browsers and Internet applications are also affected, follow these instructions and test. Any change?
If Parental Controls is active for any user, please turn it off and test. Any change?
If only Safari is affected, launch the Activity Monitor application and enter "web" (without the quotes) in the search box. If a process named "Safari Web Content" is shown in red or is using more than about 5% of a CPU, select it and force it to quit by clicking the X or Quit Process button in the toolbar of the window. There may be more than one such process. Any improvement?
Follow the instructions in this support article. Any change?
Open the iCloud preference pane and uncheck the box marked Photos, if it's checked. Any change?
Are there any other devices on the same network that can browse the Web, and are they affected?
If you can test Safari on another network, is it the same there?
If you connect to your router with Wi-Fi and you can also connect with Ethernet, do that and turn off Wi-Fi. Any difference? -
Crashing and poor performance during playback of a large project.
Hi,
I've been a regular user of iMovie for about 3 years and have edited several 50GB+ projects of DV quality footage without too many major issues with lag or 'dropped frames'. I currently have a 80GB project that resides on a 95% full 320GB Firewire 400 external drive that has been getting very slow to open and near impossible to work with.
Pair the bursting-at-the-seams external drive, with an overburdened 90% full internal drive - the poor performance wasn't to be unexpected. So I bought a 1TB Firewire 400 drive to free up some space on my Mac. My large iTunes library (150GB) was the main culprit and it was quickly moved onto the new drive.
The iMovie project was then moved onto my Mac's movie folder - I figured that the project needs some "room" to work (not that I really understand how Macs use memory) and that having roughly 80GB free with 1.5GB RAM (which is more than used to have) would make everything just that much smoother.
Wrong.
The project opened in roughly the same amount of time - but when I tried to play back the timeline, it plays like rubbish and then after 10-15 secs the Mac goes into 'sleep' mode. The screen goes off, the fans dies down and the 'heartbeat' light goes on. A click of the mouse 'wakes' the Mac only to find that if i try again, I get the same result.
I've probably got so many variables going on here that it's probably hard to suggest what the problem might be but all I could think of was repairing permissions (which I did and none needed it).
Stuck on this. Anyone have any advice?I understand completely, having worked with a 100 GB project once. I found that getting a movie bloated up to that size was just more difficult with jerky playback.
I do have a couple of suggestions for you.
You may need more than that 80GB free space for this movie. Is there any reason you cannot move it to the 1TB drive? If you have only your iTunes on it, you should have about 800 GB free.
If you still need to have the project on your computer's drive, set your computer to never sleep.
How close to finishing editing are you with this movie? If you are nearly done except for adding audio clips, you can export (share) it as QuickTime Full Quality movie. The resultant quicktime version of your iMovie will be smaller because it will contain only the clips actually used in the movie, not all the saved whole clips that iMovie keeps as its nondestructive editing feature. The quicktime movie will be one continuous clip, incorporating all your edits and added audio. It CAN be further edited, but you cannot change text of titles already there, or change transitions or remove already added audios.
I actually do this with nearly every iMovie. I create my movies by first importing videos, then adding still photos, then editing with titles, effects and transitions. I add audio last, and if it becomes too distorted in playback, I export the movie and then continue adding audio clips.
My 100+ GB movie slimmed down to only 8 GB with this method. (The large size was due to having so many clips. The movie was from VHS footage of my son's little league all-star game, and the video had so many skipped segments that I had to split it into thousands of clips to remove the dropped ones. Very old VHS tape!).
I haven't upgraded to QT 7.5.5, but I heard that the jerky playback issue is mostly resolved with this new upgrade. I am in mid-project with about 5 iMovies, so I will probably plod along with my work-around method, not wanting to upgrade in the middle of any of them.
Hope this is helpful to you.
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