How can I improve NFSv3 file performance with MythTV thru a NAS Drive?

Basically, I have both my MythTV combined frontend/backend machine and a NAS Drive connected via gigabit ethernet connections.
The NAS drive stores my recordings, shared via NFSv3 (because that's all the NAS drive came with, unfortunatly).
Now, my problem is that I can record or watch multiple *seperate* HD files simultaneously, travelling back and forth from the NAS without problem.
However when I try to watch the same file *While it's still being recorded*, after around 20 minutes the network connection is full/overloaded (between the mythserver and the NAS drive) and playback grinds to a halt (It doesn't stop the recording, just the playback).
It used to happen much quicker when I was only using a 100mb connection.
As i've said, this doesn't happen at ALL with seperate files, just only if i watch the *same* file that's being recorded at the same time.
Is there anyway (bar just having the recordings on a Hard Drive within my backend) that I can stop this problem? Is it because I use NFSv3 on the NAS drive? are there any options I can change in the /etc/exports file on the NAS drive that would help? Thanks
If you want me to post what my NAS drive (Readynas Duo V2) has in its /etc/exports file, I will

Post the file but I dunno how many Archer are using NFSv3... ;/

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How Can we improve the report performance..?

Hi exports,
I am learning the Business Objects XIR2, Please let me know How Can we improve the report performance..?
Please give the answer in detailed way.

First find out why your report is performing slowly. Then fix it.
That sounds silly, but there's really no single-path process for improving report performance. You might find issues with the report. With the network. With the universe. With the database. With the database design. With the query definition. With report variables. With the ETL. Once you figure out where the problem is, then you start fixing it. Fixing one problem may very well reveal another. I spent two years working on a project where we touched every single aspect of reporting (from data collection through ETL and all the way to report delivery) at some point or another.
I feel like your question is a bit broad (meaning too generic) to address as you have phrased it. Even some of the suggestions already given...
Array fetch size - this determines the number of rows fetched at a single pass. You really don't need to modify this unless your network is giving issues. I have seen folks suggest setting this to one (which results in a lot of network requests) or 500 (which results in fewer requests but they're much MUCH larger). Does either improve performance? They might, or they might make it worse. Without understanding how your network traffic is managed it's hard to say.
Shortcut joins? Sure, they can help, as long as they are appropriate. [Many times they are not.|http://www.dagira.com/2010/05/27/everything-about-shortcut-joins/]
And I could go on and on. The bottom line is that performance tuning doesn't typically fall into a "cookie cutter" approach. It would be better to have a specific question.

How can I improve my imac performance?

Hi guys,
When I'm using a complex files on Adobe illustrator CS4, it crashes...
How can I improve my imac performance?
Here's my system's specs:
Model Name:    iMac
Model Identifier:    iMac11,1
Processor Name:    Intel Core i5
Processor Speed:    2.66 GHz
Number Of Processors:    1
Total Number Of Cores:    4
L2 Cache (per core):    256 KB
L3 Cache:    8 MB
Memory:    4 GB
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SMC Version (system):    1.54f36
Thanks for youyr help!

I figured you'd ask for those Since I can't remember the topic/subject line, I have no idea if I have enough time in this life to try to find them - I had subscriptions for all of them, but of course, those went poof into cyberspace.
Edit: Athough the search function does not work well (could not specificy 'iMac' - would get "unauthorized to search" every time), so I had to go through quite a few, but I found two of the major threads:
https://discussions.apple.com/message/12417693#12417693
https://discussions.apple.com/message/12807961#12807961
Enjoy reading....
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How can I improve below SQL performance.

Hi,
How can I improve below SQL performance. This SQL consumes CPU and occures wait events. It is running every 10 seconds. When I look at the session information from Enterprise Manager I can see that "Histogram for Wait Event: PX Deq Credit: send blkd"
I created some indexes. I heard that the indexes are not used when there is a NULL but when I checked the xecution plan It uses index.
SELECT i.ID
FROM EXPRESS.invoices i
WHERE i.nbr IS NOT NULL
AND i.EXTRACT_BATCH IS NULL
AND i.SUB_TYPE='COD'
Explain Plan from Toad
SELECT STATEMENT CHOOSECost: 77 Bytes: 6,98 Cardinality: 349
     4 PX COORDINATOR
          3 PX SEND QC (RANDOM) SYS.:TQ10000 Cost: 77 Bytes: 6,98 Cardinality: 349
               2 PX BLOCK ITERATOR Cost: 77 Bytes: 6,98 Cardinality: 349
                    1 INDEX FAST FULL SCAN INDEX EXPRESS.INVC_TRANS_INDX Cost: 77 Bytes: 6,98 Cardinality: 349
Execution Plan from Sqlplus
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 349 | 6980 | 77 | | | |
| 1 | PX COORDINATOR | | | | | | | |
| 2 | PX SEND QC (RANDOM) | :TQ10000 | 349 | 6980 | 77 | Q1,00 | P->S | QC (RAND) |
| 3 | PX BLOCK ITERATOR | | 349 | 6980 | 77 | Q1,00 | PCWC | |
|* 4 | INDEX FAST FULL SCAN| INVC_TRANS_INDX | 349 | 6980 | 77 | Q1,00 | PCWP | |
Predicate Information (identified by operation id):
4 - filter("I"."NBR" IS NOT NULL AND "I"."EXTRACT_BATCH" IS NULL AND "I"."SUB_TYPE"='COD')
Note
- 'PLAN_TABLE' is old version
- cpu costing is off (consider enabling it)
Statistics
141 recursive calls
0 db block gets
5568 consistent gets
0 physical reads
0 redo size
319 bytes sent via SQL*Net to client
458 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
0 rows processed
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00
Redo NoWait %: 100.00
Buffer Hit %: 99.70
In-memory Sort %: 100.00
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Soft Parse %: 99.77
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Latch Hit %: 90.07
Parse CPU to Parse Elapsd %: 0.81
% Non-Parse CPU: 98.88
Top 5 Timed Events
Event     Waits     Time(s)     Avg Wait(ms)     % Total Call Time     Wait Class
latch: library cache     12,626     16,757     1,327     62.6     Concurrency
CPU time          5,712          21.Mar
latch: session allocation     1,848,987     1,99     1     07.Nis     Other
PX Deq Credit: send blkd     1,242,265     981     1     03.Tem     Other
PX qref latch     1,405,819     726     1     02.Tem     Other
The database version is 10.2.0.1 but we haven't installed the patch 10.2.0.5. yet.
I am waiting your comments.
Thanks in advance

Welcome to the forum.
I created some indexes. I heard that the indexes are not used when there is a NULL but when I checked the xecution plan It uses index. What columns are indexed?
And what do:
select i.sub_type
,      count(*)
from   express.invoices i
where i.nbr is not null
and    i.extract_batch is null
group by i.sub_type; and
select i.sub_type
,      count(*)
from   express.invoices i
group by i.sub_type; return?
Also, try use the {noformat}{noformat} tag when posting examples/execution plans etc.
See: HOW TO: Post a SQL statement tuning request - template posting for more tuning instructions.
It'll make a big difference:
SELECT i.ID
FROM EXPRESS.invoices i
WHERE i.nbr IS NOT NULL
AND i.EXTRACT_BATCH IS NULL
AND i.SUB_TYPE='COD'
Explain Plan from Toad
SELECT STATEMENT CHOOSECost: 77 Bytes: 6,98 Cardinality: 349
     4 PX COORDINATOR
          3 PX SEND QC (RANDOM) SYS.:TQ10000 Cost: 77 Bytes: 6,98 Cardinality: 349
               2 PX BLOCK ITERATOR Cost: 77 Bytes: 6,98 Cardinality: 349
                    1 INDEX FAST FULL SCAN INDEX EXPRESS.INVC_TRANS_INDX Cost: 77 Bytes: 6,98 Cardinality: 349
Execution Plan from Sqlplus
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 349 | 6980 | 77 | | | |
| 1 | PX COORDINATOR | | | | | | | |
| 2 | PX SEND QC (RANDOM) | :TQ10000 | 349 | 6980 | 77 | Q1,00 | P->S | QC (RAND) |
| 3 | PX BLOCK ITERATOR | | 349 | 6980 | 77 | Q1,00 | PCWC | |
|* 4 | INDEX FAST FULL SCAN| INVC_TRANS_INDX | 349 | 6980 | 77 | Q1,00 | PCWP | |
Predicate Information (identified by operation id):
4 - filter("I"."NBR" IS NOT NULL AND "I"."EXTRACT_BATCH" IS NULL AND "I"."SUB_TYPE"='COD')
Note
- 'PLAN_TABLE' is old version
- cpu costing is off (consider enabling it)
Statistics
141 recursive calls
0 db block gets
5568 consistent gets
0 physical reads
0 redo size
319 bytes sent via SQL*Net to client
458 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
0 rows processed
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00
Redo NoWait %: 100.00
Buffer Hit %: 99.70
In-memory Sort %: 100.00
Library Hit %: 99.81
Soft Parse %: 99.77
Execute to Parse %: 63.56
Latch Hit %: 90.07
Parse CPU to Parse Elapsd %: 0.81
% Non-Parse CPU: 98.88
Top 5 Timed Events
Event     Waits     Time(s)     Avg Wait(ms)     % Total Call Time     Wait Class
latch: library cache     12,626     16,757     1,327     62.6     Concurrency
CPU time          5,712          21.Mar
latch: session allocation     1,848,987     1,99     1     07.Nis     Other
PX Deq Credit: send blkd     1,242,265     981     1     03.Tem     Other
PX qref latch     1,405,819     726     1     02.Tem     Other

How can I improve my file tranfer performance

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I have a Sun E10k with 100Mb cards locked at 100/full. Does anyone have a suggestions on how to bring SCP more in-line with the rcp transfer rate?

is this from ISP-to-ISP or is this within the same network LAN..? How close are the computers 10 feet away or 2000 miles away?
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You have transfers that take 10 hrs using rcp. Then you say rcp takes 1.5 minitues. Interesting but need more facts.

How can I improve my FMS performance?

Hi...
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</Client>
</Application>
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My RAM usage is always low... 1,1 GB... and also my CPU usage is low. The FMSCore.exe process reaches 630 MB usage and then stays at this level.
How can I use my server's RAM or have you any tips or suggestions to improve FMS performance with some special settings?
I tried to change this in fms.ini:
SERVER.FLVCACHE_MAXSIZE=500
to 1000 but the application crashes after it reaches 2GB of RAM.
Thanks in advance
best,
Marco

Hi,
Thanks for trying the different settings...
When we talk of tuning for the best performance, different settings are required for different scenarios, for example, a live broadcast would require aggregation of messages (if latency is OK) but a live conferencing solution might need to disable it. So unless the use case is little briefed it is tough to conclude on any generic settings to improve performance.
I would also like to comment on the FLVCache size. I recommend it to be set to 1/4 the size of your RAM. And you can safely tweak only the SERVER.MAXFLVCACHESIZE variable without worrying on the other variable (which is in percentage). This is supposed to take priority over all other settings.
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Also, you need to make sure of the client side buffer settings to match your FMS settings as well as your use case requirements.
Hope it all helps.
Thank you !

How can I improve Adobe CS5 performance?

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Will adding a dedicated graphics card improve CS5's performance? I have read on forums that Mac users use a 2nd hard drive as a 'scratch disk' for the likes of photoshop which improves the performance but not sure how to implement that.
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You need either Pages '09 or the original Pages '08? programs.
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Peter

How can i improve my system performance

hello Experts,
today i faced one problem
i,e i got mails from users that my server is very slow
i checked
responce time--985ms
and no long running jobs and also buffers also fine
in my system all things are fine
now want to know to check how much network utilization required to my sap server?
i have doubt in network utilization ....i need help in tis way only
Regards

Is the DB on a separate server? I ask because even a fairly slow public network (i.e. for SAPGUI) is unlikely to be a cause of major performance problems. Note 'unlikely', not 'impossible'. If the DB is separated from CI and/or DI and that link is 100Mb/s, things can get nasty.
Slow performance is real tricky to solve blind. You say your system is fine and you mention SAP-level metrics. How about other stuff?
Paging rate
CPU load averages
Runaway processes at O/S level
If Windows server, check for an antivirus program monitoring \usr\sap\.....
Filesystem/volume access speeds
System log messages (OS not SAP)
Regards,
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How can you tell which files have backed up to external hard drive using Time Machine?

Hello Mac Users,
I have Macbook Pro (early 2011) and recently purchased a WD My Passport for Mac external HD. I have completed a back up using Time Machine, however how do I tell what files actually were backed up? I have a ton of audio, documents and photos that I would like on there. Its a 2 TB HD, my memory is 750 GB... Im using 632. At end of back up, the drive still had 1.88 TB left. Any help would be appreciated! Thanks
Linz19

This procedure is a diagnostic test. It makes no changes to your data.
Please triple-click anywhere in the line below on this page to select it:
tmutil compare | open -ef
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
Paste into the Terminal window by pressing command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.
The command may take several minutes to run. Wait for a new line ending in a dollar sign ($) to appear below what you entered.
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Each line that begins with an exclamation point (“!”) represents a file that has changed on the source volume. These files have been backed up, but not in their present state.
Each line that begins with a minus sign (“-“) represents a file that has been removed from the source volume.
Files that you’ve excluded from backup, or that are excluded automatically, are ignored.
At the end of the output, you’ll get some lines like the following:
Added:
Removed:
Changed:
These lines show the total amount of data added, removed, or changed on the source(s) since the last snapshot.
Caution: Under some conditions, tmutil may falsely flag files as not having been backed up when in fact they have been. It can be confused by multi-linked files, or by files with a modification date earlier than the one in the snapshot. This will not be an issue for most users. If the results of the above procedure surprise you, inspect your snapshots directly.

How can we access a file that is on a mapped network drive.

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How can I access it using file: using a client application running on that server.
Thanks.

ag2007 wrote:
When I use it the above way I am getting the following exception:
java.io.FileNotFoundException: \\network\share\Temp\temp.txt (Logon failure: unknown username or bad password).
From the above I can say that I need to specify the username and password.
Now my question is how do I specify the username and password in the URI?
Thanks for the help.You don't. It is required that the user account running the code already has permissions to the directory in the first place.

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I think I was encountering the same issue.
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I closed my topic because I solved it :
https://discussions.apple.com/message/16640910
Is it the same for you ?

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Prakash

Scale up or scale out.
Either provide your SharePoint servers with more CPU and RAM (scaling up) or add more servers to the farm (scaling out) to allow the load to be shared between the servers.
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I use only request beans, state save method is server.
How can I improve it, what is with state manager, save state tree.?

Profile your application and find the CPU hotspots. Then you can figure out what needs improvement.

How can we improve performance while selection production orders from resb

Dear all,
there is a performance issue in a report which compares sales order and production order.
Below is the code, in this while reading production order data from resb with the below select statement.
can any body tell me how can we improve the performance? should we use indexing, if yes how to use indexing.
*read sales order data
SELECT vbeln posnr arktx zz_cl zz_qty
INTO (itab-vbeln, itab-sposnr, itab-arktx, itab-zz_cl, itab-zz_qty)
FROM vbap
WHERE vbeln = p_vbeln
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Himanshu,
Put a break point before these two select statements and execute in the production.This way you will come to know which select statement is taking much time to get executed.
In both the select statements the where clause is not having the primary keys.
Coming to the point of selecting the data from vbap do check the SAP note no:-185530 accordigly modify the select statement.
As far as the table RESB is concerened here also the where clause doesn't have the primary keys.Do check the SAP Note No:-187906.
I guess not using primary keys is maring the performance.
K.Kiran.

How can I improve NFSv3 file performance with MythTV thru a NAS Drive?

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