16 ms response time - is it noticable?
I really want to plunk down the cash for a 23"...but that response time is just killing me...there are many displays out now that have it down to 5 ms or less...
I am currently on a 20" iMac...will I notice a difference?
Hi-
It all depends on what your uses are. The response time of a monitor will only really be noticeable in watching DVD movies, TV (action, sports), or if you are a hard core gamer.
As an owner of a 23" Cinema Display, I have no issues with the response time of my monitor. If it is slow, I do not notice while watching video DVD's, or, while playing games- most all are action, shooters, and racing. I am very satisfied with the performance in those areas.
As for usual computer use- word processing, photo touch up, CAD drawings, internet, etc., I only have praise for the beauty of the display, the quality of the display images, and the LARGE desktop.
Conversely, when I bought my LCD television, response time was a very important buying point. Because of the fast pace of scene changes, high movement of sports and action movies, and viewing things like trailing news line text, fast response time makes a big difference in the overall viewing quality.
Bottom line- with monitors, response time isn't all that matters. The following links are for your continued research (if you please):
http://reviews.cnet.com/AppleCinema_Display_23_inch_LCD/4505-31747-30964608.html?tag=sub
http://reviews.cnet.com/AppleCinema_Display_23_inch_LCD/4852-31747-30964608.html
http://reviews.cnet.com/4520-3118_7-6358806-1.html
http://www.lcdtvbuyingguide.com/lcdtv/lcdtv-responsetime.shtml
G4AGP(450)Sawtooth, 2ghz PowerLogix, 2gbRAM, 300gbSATA+160gbATA, ATI Radeon 9800 Mac OS X (10.4.8) Pioneer DVR-109, ExtHD 160gb x2, 23"Cinema Display, Ratoc USB2.0, Nikon Coolscan
Similar Messages
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I am a new Apple user and had a visitor, with an iPad, at my house. I noticed the response time slowed greatly. I have a Linksys N router and wondered if I need an Apple router to allow the speed to be consistent.
I am a new Apple user and had a visitor, with an iPad, at my house. I noticed the response time slowed greatly. I have a Linksys N router and wondered if I need an Apple router to allow the speed to be consistent.
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Response Time of a query in 2 different enviroment
Hi guys Luca speaking, sorry for the bad written english
the questions is:
The same query on the same table, for definition, number of rows, defined on the same kind of tablespace, the tables are analized
*) I have a query in Benchmark with good results in execution time, the execution plan is really good
*) in Production the execution plan is not so good, the response time isn't comparable (hours vs seconds)
#### The Execution Plan are different ####
#### The stats are the same ####
this a table storico.FLUSSO_ASTCM_INC A with this stats in benchmark
chk Owner Name Partition Subpartition Tablespace NumRows Blocks EmptyBlocks AvgSpace ChainCnt AvgRowLen AvgSpaceFLBlocks NumFLBlocks UserStats GlobalStats LastAnalyzed SampleSize Monitoring Status
True STORICO FLUSSO_ASTCM_INC TBS_DATA 2861719 32025 0 0 0 74 NO YES 10/01/2006 15.53.43 2861719 NO Normal, Successful Completion: 10/01/2006 16.26.05
in Production the stas are the same
the other one is an external_table
the only differences that I noticed at the moment is about the tablespace used to defined the table on:
Production
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 512K
Benchmark
EXTENT MANAGEMENT LOCAL AUTOALLOCATE
I'm studing on at the moment
What I have to check to obtain the same execution plan (without change the query)
This is the query:
SELECT
'test query',
sysdate,
storico.tc_scarti_seq.NEXTVAL,
NULL, --ROW_ID
-- A.AZIONE,
'I',
A.CODE_PREF_TCN,
A.CODE_NUM_TCN,
'ADSL non presente su CRM' ,
-- a.AZIONE
'I'
|| ';' || a.CODE_PREF_TCN
|| ';' || a.CODE_NUM_TCN
|| ';' || a.DATA_ATVZ_CMM
|| ';' || a.CODE_PREF_DSR
|| ';' || a.CODE_NUM_TFN
|| ';' || a.DATA_CSSZ_CMM
|| ';' || a.TIPO_EVENTO
|| ';' || a.INVARIANTE_FONIA
|| ';' || a.CODE_TIPO_ADSL
|| ';' || a.TIPO_RICHIESTA_ATTIVAZIONE
|| ';' || a.TIPO_RICHIESTA_CESSAZIONE
|| ';' || a.ROW_ID_ATTIVAZIONE
|| ';' || a.ROW_ID_CESSAZIONE
FROM storico.FLUSSO_ASTCM_INC A
WHERE NOT EXISTS (SELECT 1 FROM storico.EXT_CRM_X_ADSL B
WHERE A.CODE_PREF_DSR = B.CODE_PREF_DSR
AND A.CODE_NUM_TFN = B.CODE_NUM_TFN
AND A.INVARIANTE_FONIA = B.INVARIANTE_FONIA
AND B.NOME_SERVIZIO NOT IN ('ADSL SMART AGGREGATORE','ADSL SMART TWIN','ALICE IMPRESA TWIN',
'SERVIZIO ADSL PER VIDEOLOTTERY','WI - FI') )
Esito di set autotrace traceonly explain ESERCIZIO
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=144985 Card=143086 B
1 0 SEQUENCE OF 'TC_SCARTI_SEQ'
2 1 FILTER
3 2 TABLE ACCESS (FULL) OF 'FLUSSO_ASTCM_INC' (Cost=1899 C
4 2 EXTERNAL TABLE ACCESS* (FULL) OF 'EXT_CRM_X_ADSL' (Cos :Q370300
4 PARALLEL_TO_SERIAL SELECT /*+ NO_EXPAND FULL(A1) */ A1."CODE_PR
Esito di set autotrace traceonly explain BENCHMARK
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=3084 Card=2861719 By
tes=291895338)
1 0 SEQUENCE OF 'TC_SCARTI_SEQ'
2 1 HASH JOIN* (ANTI) (Cost=3084 Card=2861719 Bytes=29189533 :Q810002
8)
3 2 TABLE ACCESS* (FULL) OF 'FLUSSO_ASTCM_INC' (Cost=3082 :Q810000
Card=2861719 Bytes=183150016)
4 2 EXTERNAL TABLE ACCESS* (FULL) OF 'EXT_CRM_X_ADSL' (Cos :Q810001
t=2 Card=1 Bytes=38)
2 PARALLEL_TO_SERIAL SELECT /*+ ORDERED NO_EXPAND USE_HASH(A2) US
E_ANTI(A2) */ A1.C0,A1.C1,A1.C2,A1.C
3 PARALLEL_FROM_SERIAL
4 PARALLEL_TO_PARALLEL SELECT /*+ NO_EXPAND FULL(A1) */ A1."CODE_PR
EF_DSR" C0,A1."CODE_NUM_TFN" C1,A1."
The differences on the InitOra are on these parameters:
Could they influence the Optimizer, and the execution plan are so different
background_dump_dest
cpu_count
db_file_multiblock_read_count
db_files
db_32k_cache_size
dml_locks
enqueue_resources
event
fast_start_mttr_target
fast_start_parallel_rollback
hash_area_size
log_buffer
log_parallelism
max_rollback_segments
open_cursors
open_links
parallel_execution_message_size
parallel_max_servers
processes
query_rewrite_enabled
remote_login_passwordfile
session_cached_cursors
sessions
sga_max_size
shared_pool_reserved_size
sort_area_retained_size
sort_area_size
star_transformation_enabled
transactions
undo_retention
user_dump_dest
utl_file_dir
Please Help me
Thanks a lot LucaHi Luca,
test and production system are nearly identicall (same OS, same HW Plattform, same software version, same release)
you're using external tables. Are the speed of these drives are identically?
have you analyzed the schema with the same statement? Could you send me the statement?
have you system statistics?
have you testet the statement in an environment which is nearly like the production? concurrent user etc.
Could you send me the top 5 wait events from the statspack report.
Are the data from production and test identical? No data changed. No Index drop? No additional Index? All tables and indexes are analyzed
Regards
Marc -
ISE 1.2 Auth Avg Response Time
Hi Guys,
We have recently moved to ISE 1.2 (distributed deployment on UCS C220 blades) from ACS 5.x. We are seeing Avergage Auth response time ~150ms in each PSN nodes (4 in total) & wonder whether this is too slow.
Is this normal or we should have much lower average response time for thos radius authentications ? What are the typical value you guys observed in those sort of deployment
Any input would be much appreciated
RasikaHi,
Where did you get your information from? Is it from the ISE Authentication Report Summary? If so, which of the Average responses are you concerned about? Authentications By Day, Identity Group, Identity Store, Allowed Protocol etc.
In my network average response based on protocol PEAP is 121ms. Authentication by day is 74ms. Then again my network may be smaller than yours. Also I have an appliance and not a Virtual Server. In my opinion, I don't think 150ms is that much to make the user notice. If authentication response gets close to 300ms, then you have an issue.
If you have a very large network like a University Campus, then 150ms is OK. -
Spry menu response time problems with IE
We implemented the spry vertical menu for showing the
categories of a products catalog. It has almost 1400 categories
organizad at about 5 levels, some categories have about 20
subcategories. These categories are in a coldfusion session
variable.
It works perfect in mozilla, but in IE7 and IE6 in some
computers, present this problem:
- The response time is slow when you change from one category
that has subcategories to ahother. If you see the Windows Task
Manager of the computer while you use the menu, the processor use
go up to the top level.
And the effiecience of the menu decrease.
See in
http://edit.panamericana.com.co/
Thanks,
Alejandromdr4win wrote:
i dont think you understood my question, wasnt about body background, but abut the spry image slideshow to work properly in IE
I was not talking about body background, but about having markup that screws up your document when using a browser. Body background just happened to be there. Perhaps you would do well to have a look here http://validator.w3.org/check?verbose=1&uri=http%3A%2F%2Flittletreats.org%2F.
I have noticed that you ignored my solution; your document still shows two bodies.
Perhaps I should have mentioned that I tested in IE6 through to IE9 using IETester and the above was the only thing stopping IE from performing properly.
How did you determine that the slideshow was not working correctly in IE and which versions of IE?
Grumps -
FOR ORACLE XML TEAM -- XML TOOLS BUG FIXING POLICY/RESPONSE TIME/RELEASE SCHEDULE
Hi,
The release of Oracle XML tools and utilities by Oracle XML team is a significant milestone and is definitely appreciated. However, as part of a large organization, some factors need to be clarified before using these utilities in production softwares.
I have noticed that XML parsers and other utilities are now coming as part of other softwares like JDeveloper etc. Following are my questions to the Oracle XML team and urgent and prompt reply will be greatly appreciated.
1. What is the XML tools support policy. Is it only OTN? Can we buy support? Are these utilities supported if large organizations have corporate server licenses. I have read at the XML site the XDK is fully and freely supported by Oracle Word Wide support. What does this mean?
2. What is the release schedule for the XML tools?
3. What is the response time?
Once again, your help and prompt reply will be appreciated.
Thanks.As you noted many of the Oracle XDK components are production. This means that if your company has an Oracle Server Support contract you will get the corresponding level of support for the production XDK components.
If you don't have one, then OTN is your support resource. We will also have standalone support agreements in the future which you can purchase through the Oracle Store. The response time would be the same as for the server.
There is not a specific release schedule for components on OTN as they have different development schedules.
Oracle XML Team
null -
Slow response time for HTTP requests
I have an 8310 Pearl. For the past week, I've noticed that the response time using the Internet browser was very slow. One work-around was to cancel the request and then submit it again. The second request returned the page MUCH faster.
I cleared my history, and this seemed to have helped. Has anyone else noticed this? ThanksWelcome to the forums
Try a Battery Pull:
1. Remove the battery while phone is turned on
2. Wait a few seconds before inserting it again
3. Allow the long boot up process to finish (takes a few minutes usually)
This clears most software issues that occur on blackberries from time to time. You could also use Quickpull, a free app that simulates a battery pull without physically removing the battery: http://software.crackberry.com/product.asp?id=27660
A battery pull reclaims memory lost during application usage and clears minor software errors that creep in over time. The blackberry runs an OS just like your PC runs windows and the battery pull is the equivalent of a reboot/restart on your computer.
Kijana
Please remember to:
1. Mark Accept as Solution on the appropriate post once your issue has been resolved
2. Give Kudos to helpful posts (click the star next to the post)
Thanks -
How to Tune the Transactions/ Z - reports /Progr..of High response time
Dear friends,
in <b>ST03</b> work load anlysis menu.... there are some z-reports, transactions, and some programmes are noticed contineously that they are taking the <b>max. response time</b> (and mostly >90%of time is DB Time ).
how to tune the above situation ??
Thank u.Siva,
You can start with some thing like:
ST04 -> Detail Analysis -> SQL Request (look at top disk reads and buffer get SQL statements)
For the top SQL statements identified you'd want to look at the explain plan to determine if the SQL statements is:
1) inefficient
2) are your DB stats up to date on the tables (note up to date stats does not always means they are the best)
3) if there are better indexes available, if not would a more suitable index help?
4) if there are many slow disk reads, is there an I/O issue?
etc...
While you're in ST04 make sure your buffers are sized adequately.
Also make sure your Oracle parameters are set according to this OSS note.
Note 830576 - Parameter recommendations for Oracle 10g -
All,
I am in a predicament with internet browsing speeds...We have a 3rd party look after our line and internet facing f/w so I cant troubleshoot them, so at the moment Im looking at ISA as the potential bottleneck - we have a fairly standard environment:
Internal > Local Host > Perimiter n/work > Firewall > Internet
I have been running custom reports on the ISA server to see what data can be collected - I have noticed that "Average response time for non cached requests" (traffic by time of day) can be as high as 76 seconds!!!!!! Cached hits are between .5
and 2 seconds.
I have also coonfigured a connectivity verifier which is also flagging slow connectivity, massively over the >5000ms and also reporting "cant resolve server name on occassions- and this is configured for
www.Microsoft.com --- DNS ???!?!, however I have looked through DNS (no obvious errors / config issues) which I can see
I have run the BPA on ISA server to ensure its Health - - connectivity verifier errors flagged timeouts to microsoft.com as expected...
Can anyone advise any obvious areas to investigate as Im struggling! - as always the 3rd party have told us the internet pipe is fine :OProblem resolved.
DNS forwarders have been changed on the ISA server / DNS and this has improved lookup speed considerably.
thanks all :) -
Hello,
Problem: New SG-200 26P Smart Switch with Latest Firmware - Very High Responce Time 500-800ms
We've a EdgeMarc 4500 Router with 10 VPN tunnels to 10 brach locations. SG-200 26P Smart Switch is connected to 7 Servers (2 Terminal, SQL, and Other) All locations have 50MB Download and 20MB Upload speed from Verizon FiOS Internet service.
As per the SolarWind tool, the response time of this switch is around at 500ms. At the same time, the EdgeMarc 4500 router response time is around 40ms and less.
We've 60 desktops remotely connected to our SQL Server database and 40 RDP Users via Remote Desktop. The configuration is same from past 3 years. But we change the switch from HP 1800-24G to Cisco due to some Connection Failures. For Connection Failures, we first suspect the old HP switch, but it's look like issue with EdgeMarc Router.
Is this Response Time is normal? I attached two screenshots of both Cisco Switch and EdgeMarc Router Response Time from past 24 hours according to SolarWind tool. Any further advice would be greatly appreciated. Thank you.Hello Srinath,
Thank you for participating in the Small Business support community. My name is Nico Muselle from Cisco Sofia SBSC.
The response time from the switch could be considered as quite normal. Reason for this is that the switch gives CPU priority to it's actual duties which would of course be switching, access lists, VLANs, QoS, multicast and DHCP snooping etc etc. As a result of that, ping response times of the switch itself do not show in any way the correct working of the switch.
I invite you to try pinging clients connected to the switch, you should be able to notice that response times to the clients are a lot lower than response times of the switch itself.
Hope this answers your question !
Best regards,
Nico Muselle
Sr. Network Engineer - CCNA - CCNA Security -
Why is the response time when using clickwheel...
I've bought a new 60gb video and, in comparison to my 20gb 3rd generation, the response time when using the clickwheel (next track/pause/play/bak track) is annoyingly long on start-up. And the display takes seconds to catch up with what's playing sometimes freezing with half of the one 'page' showing and half of another. Should I expect this because of the larger capacity/more complex iPod?
Also, in an earlier post I noted that when the iPod first fires up, tracks seem to stop and start - just for a second or so, 3 or 4 times within the first 15 seconds. It's not the track on iTunes as it never happens on my 3g.
Dell Windows XPDefinately sounds like a faulty harddrive.
You could always try restoring it with the most recent updater, and reloading everything - kind of like a fragmented harddrive, I am noticing better performance since I last wiped it clean and relaoded it (due to another error - actually).... -
Response time of query utterly upside down because of small where clause change
Hello,
I'm wondering why a small change on a where clause in a query has a dramatic impact on its response time.
Here is the query, with its plan and a few details:
select * from (
SELECT xyz_id, time_oper, ...
FROM (SELECT
d.xyz_id xyz_id,
TO_CHAR (di.time_operation, 'DD/MM/YYYY') time_oper,
di.time_operation time_operation,
UPPER (d.delivery_name || ' ' || d.delivery_firstname) custname,
d.ticket_language ticket_language, d.payed,
dsum.delivery_mode delivery_mode,
d.station_delivery station_delivery,
d.total_price total_price, d.crm_cust_id custid,
d.bene_cust_id person_id, d.xyz_num, dpe.ers_pnr ers_pnr,
d.delivery_name,
TO_CHAR (dsum.first_travel_date, 'DD/MM/YYYY') first_traveldate,
d.crm_company custtype, UPPER (d.client_name) partyname,
getremark(d.xyz_num) remark,
d.client_app, di.work_unit, di.account_unit,
di.distrib_code,
UPPER (d.crm_name || ' ' || d.crm_firstname) crm_custname,
getspecialproduct(di.xyz_id) specialproduct
FROM xyz d, xyz_info di, xyz_pnr_ers dpe, xyz_summary dsum
WHERE d.cancel_state = 'N'
-- AND d.payed = 'N'
AND dsum.delivery_mode NOT IN ('DD')
AND dsum.payment_method NOT IN ('AC', 'AG')
AND d.xyz_blocked IS NULL
AND di.xyz_id = d.xyz_id
AND di.operation = 'CREATE'
AND dpe.xyz_id(+) = d.xyz_id
AND EXISTS (SELECT 1
FROM xyz_ticket dt
WHERE dt.xyz_id = d.xyz_id)
AND dsum.xyz_id = di.xyz_id
ORDER BY di.time_operation DESC)
WHERE ROWNUM < 1002
) view
WHERE view.DISTRIB_CODE in ('NS') AND view.TIME_OPERATION > TO_DATE('20/5/2013', 'dd/MM/yyyy')
plan with "d.payed = 'N'" (no rows, *extremely* slow):
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1001 | 4166K| 39354 (1)| 00:02:59 |
|* 1 | VIEW | | 1001 | 4166K| 39354 (1)| 00:02:59 |
|* 2 | COUNT STOPKEY | | | | | |
| 3 | VIEW | | 1001 | 4166K| 39354 (1)| 00:02:59 |
| 4 | NESTED LOOPS OUTER | | 1001 | 130K| 39354 (1)| 00:02:59 |
| 5 | NESTED LOOPS SEMI | | 970 | 111K| 36747 (1)| 00:02:47 |
| 6 | NESTED LOOPS | | 970 | 104K| 34803 (1)| 00:02:39 |
| 7 | NESTED LOOPS | | 970 | 54320 | 32857 (1)| 00:02:30 |
|* 8 | TABLE ACCESS BY INDEX ROWID| XYZ_INFO | 19M| 704M| 28886 (1)| 00:02:12 |
| 9 | INDEX FULL SCAN DESCENDING| DNIN_IDX_NI5 | 36967 | | 296 (2)| 00:00:02 |
|* 10 | TABLE ACCESS BY INDEX ROWID| XYZ_SUMMARY | 1 | 19 | 2 (0)| 00:00:01 |
|* 11 | INDEX UNIQUE SCAN | SB11_DSMM_XYZ_UK | 1 | | 1 (0)| 00:00:01 |
|* 12 | TABLE ACCESS BY INDEX ROWID | XYZ | 1 | 54 | 2 (0)| 00:00:01 |
|* 13 | INDEX UNIQUE SCAN | XYZ_PK | 1 | | 1 (0)| 00:00:01 |
|* 14 | INDEX RANGE SCAN | DNTI_NI1 | 32M| 249M| 2 (0)| 00:00:01 |
| 15 | TABLE ACCESS BY INDEX ROWID | XYZ_PNR_ERS | 1 | 15 | 4 (0)| 00:00:01 |
|* 16 | INDEX RANGE SCAN | DNPE_XYZ | 1 | | 2 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - filter("DISTRIB_CODE"='NS' AND "TIME_OPERATION">TO_DATE(' 2013-05-20', 'syyyy-mm-dd'))
2 - filter(ROWNUM<1002)
8 - filter("DI"."OPERATION"='CREATE')
10 - filter("DSUM"."DELIVERY_MODE"<>'DD' AND "DSUM"."PAYMENT_METHOD"<>'AC' AND "DSUM"."PAYMENT_METHOD"<>'AG')
11 - access("DSUM"."XYZ_ID"="DI"."XYZ_ID")
12 - filter("D"."PAYED"='N' AND "D"."XYZ_BLOCKED" IS NULL AND "D"."CANCEL_STATE"='N')
^^^^^^^^^^^^^^
13 - access("DI"."XYZ_ID"="D"."XYZ_ID")
14 - access("DT"."XYZ_ID"="D"."XYZ_ID")
16 - access("DPE"."XYZ_ID"(+)="D"."XYZ_ID")
plan with "d.payed = 'N'" (+/- 450 rows, less than two minutes):
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1001 | 4166K| 58604 (1)| 00:04:27 |
|* 1 | VIEW | | 1001 | 4166K| 58604 (1)| 00:04:27 |
|* 2 | COUNT STOPKEY | | | | | |
| 3 | VIEW | | 1002 | 4170K| 58604 (1)| 00:04:27 |
| 4 | NESTED LOOPS OUTER | | 1002 | 130K| 58604 (1)| 00:04:27 |
| 5 | NESTED LOOPS SEMI | | 1002 | 115K| 55911 (1)| 00:04:14 |
| 6 | NESTED LOOPS | | 1476 | 158K| 52952 (1)| 00:04:01 |
| 7 | NESTED LOOPS | | 1476 | 82656 | 49992 (1)| 00:03:48 |
|* 8 | TABLE ACCESS BY INDEX ROWID| XYZ_INFO | 19M| 704M| 43948 (1)| 00:03:20 |
| 9 | INDEX FULL SCAN DESCENDING| DNIN_IDX_NI5 | 56244 | | 449 (1)| 00:00:03 |
|* 10 | TABLE ACCESS BY INDEX ROWID| XYZ_SUMMARY | 1 | 19 | 2 (0)| 00:00:01 |
|* 11 | INDEX UNIQUE SCAN | AAAA_DSMM_XYZ_UK | 1 | | 1 (0)| 00:00:01 |
|* 12 | TABLE ACCESS BY INDEX ROWID | XYZ | 1 | 54 | 2 (0)| 00:00:01 |
|* 13 | INDEX UNIQUE SCAN | XYZ_PK | 1 | | 1 (0)| 00:00:01 |
|* 14 | INDEX RANGE SCAN | DNTI_NI1 | 22M| 168M| 2 (0)| 00:00:01 |
| 15 | TABLE ACCESS BY INDEX ROWID | XYZ_PNR_ERS | 1 | 15 | 4 (0)| 00:00:01 |
|* 16 | INDEX RANGE SCAN | DNPE_XYZ | 1 | | 2 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - filter("DISTRIB_CODE"='NS' AND "TIME_OPERATION">TO_DATE(' 2013-05-20', 'syyyy-mm-dd'))
2 - filter(ROWNUM<1002)
8 - filter("DI"."OPERATION"='CREATE')
10 - filter("DSUM"."DELIVERY_MODE"<>'DD' AND "DSUM"."PAYMENT_METHOD"<>'AC' AND "DSUM"."PAYMENT_METHOD"<>'AG')
11 - access("DSUM"."XYZ_ID"="DI"."XYZ_ID")
12 - filter("D"."XYZ_BLOCKED" IS NULL AND "D"."CANCEL_STATE"='N')
13 - access("DI"."XYZ_ID"="D"."XYZ_ID")
14 - access("DT"."XYZ_ID"="D"."XYZ_ID")
16 - access("DPE"."XYZ_ID"(+)="D"."XYZ_ID")
XYZ.PAYED values breakdown:
P COUNT(1)
Y 12202716
N 9430207
tables nb of records:
TABLE_NAME NUM_ROWS
XYZ 21606776
XYZ_INFO 186301951
XYZ_PNR_ERS 9716471
XYZ_SUMMARY 21616607
Everything that comes inside the "select * from(...) view" parentheses is defined in a view. We've noticed that the line "AND d.payed = 'N'" (commented above) is the guilty clause: the query takes one or two seconds to return between 400 and 500 rows if this line is removed, when included in the query, the response time then switches to *hours* -sic !- but then the result set is empty (no rows returned). The plan is exactly the same whether this "d.payed = 'N'" is added or removed, I mean the nb of steps, access paths, join order etc., only the rows/bytes/cost columns values change, as you can see.
We've found no other way of solving this perf issue but by taking out this "d.payed = 'N'" condition and setting it outside the view along with view.DISTRIB_CODE and view.TIME_OPERATION.
But we would like to understand why such a small change on the XYZ.PAYED column turns everything upside down that much, and we'd like to be able to tell the optimizer to perform this check on payed = 'N' by itself in the end, just like we did, through the use of a hint if possible...
Anybody ever encountered such a behaviour before ? Do you have any advice regarding the use of a hint to reach the same response time as that we've got by setting the payed = N condition outside of the view definition ??
Thanks a lot in advance.
Regards,
SebI am really sorry I couldn't get back earlier to this forum...
Thanks to you all for your answers.
First I'd just like to correct a small mistake I made, when writing
"the query takes one or two seconds": I meant one or 2 *minutes*. Sorry.
> What table/columns are indexed by "DNTI_NI1"?
aaaa.dnti_ni1 is an index ON aaaa.xyz_ticket(xyz_id, ticket_status)
> And what are the indexes on xyz table?
Too many:
XYZ_ARCHIV_STATE_IND ARCHIVE_STATE
XYZ_BENE_CUST_ID_IND BENE_CUST_ID
XYZ_BENE_TTL_IND BENE_TTL
XYZ_CANCEL_STATE_IND CANCEL_STATE
XYZ_CLIENT_APP_NI CLIENT_APP
XYZ_CRM_CUST_ID_IND CRM_CUST_ID
XYZ_DELIVE_MODE_IND DELIVERY_MODE
XYZ_DELIV_BLOCK_IND DELIVERY_BLOCKED
XYZ_DELIV_STATE_IND DELIVERY_STATE
XYZ_XYZ_BLOCKED XYZ_BLOCKED
XYZ_FIRST_TRAVELDATE_IND FIRST_TRAVELDATE
XYZ_MASTER_XYZ_IND MASTER_XYZ_ID
XYZ_ORG_ID_NI ORG_ID
XYZ_PAYMT_STATE_IND PAYMENT_STATE
XYZ_PK XYZ_ID
XYZ_TO_PO_IDX TO_PO
XYZ_UK XYZ_NUM
For ex. XYZ_CANCEL_STATE_IND on CANCEL_STATE seems superfluous to me, as the column may only contain Y or N (or be null)...
> Have you traced both cases to compare statistics? What differences did it reveal?
Yes but it only shows more of *everything* (more tables blocks accessed, the same
for indexes blocks, for almost all objects involved) for the slowest query !
Greping WAIT on the two trc files made for every statement and counting the
object IDs access show that the quicker query requires much less I/Os; the
slowest one overall needs much more blocks to be read (except for the indexes
DNSG_NI1 or DNPE_XYZ for example). Below I replaced obj# with the table/index
name, the first column is the figure showing how many times the object was
accessed in the 10053 file (I ctrl-C'ed my second execution ofr course, the
figures should be much higher !!):
[login.hostname] ? grep WAIT OM-quick.trc|...|sort|uniq -c
335 XYZ_SUMMARY
20816 AAAA_DSMM_XYZ_UK (index on xyz_summary.xyz_id)
192 XYZ
4804 XYZ_INFO
246 XYZ_SEGMENT
6 XYZ_REMARKS
63 XYZ_PNR_ERS
719 XYZ_PK (index on xyz.xyz_id)
2182 DNIN_IDX_NI5 (index on xyz.xyz_id)
877 DNSG_NI1 (index on xyz_segment.xyz_id, segment_status)
980 DNTI_NI1 (index on xyz_ticket.xyz_id, ticket_status)
850 DNPE_XYZ (index on xyz_pnr_ers.xyz_id)
[login.hostname] ? grep WAIT OM-slow.trc|...|sort|uniq -c
1733 XYZ_SUMMARY
38225 AAAA_DSMM_XYZ_UK (index on xyz_summary.xyz_id)
4359 XYZ
12536 XYZ_INFO
65 XYZ_SEGMENT
17 XYZ_REMARKS
20 XYZ_PNR_ERS
8598 XYZ_PK
7406 DNIN_IDX_NI5
29 DNSG_NI1
2475 DNTI_NI1
27 DNPE_XYZ
The overwhelmingly dominant wait event is by far 'db file sequential read':
[login.hostname] ? grep WAIT OM-*elect.txt|cut -d"'" -f2|sort |uniq -c
36 SQL*Net message from client
38 SQL*Net message to client
107647 db file sequential read
1 latch free
1 latch: object queue header operation
3 latch: session allocation
> It will be worth knowing the estimations...
It show the same plan with a higher cost when PAYED = N is added:
SQL> select * from sb11.dnr d
2* where d.dnr_blocked IS NULL and d.cancel_state = 'N'
SQL> /
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1002 | 166K| 40 (3)| 00:00:01 |
|* 1 | TABLE ACCESS BY INDEX ROWID| XYZ | 1002 | 166K| 40 (3)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | XYZ_CANCEL_STATE_IND | | | 8 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - filter("D"."XYZ_BLOCKED" IS NULL)
2 - access("D"."CANCEL_STATE"='N')
SQL> select * from sb11.dnr d
2 where d.dnr_blocked IS NULL and d.cancel_state = 'N'
3* and d.payed = 'N'
SQL> /
Execution Plan
Plan hash value: 1292668880
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1001 | 166K| 89 (3)| 00:00:01 |
|* 1 | TABLE ACCESS BY INDEX ROWID| XYZ | 1001 | 166K| 89 (3)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | XYZ_CANCEL_STATE_IND | | | 15 (0)| 00:00:01 | -
Get alerted after 5 metric breaches for Response Time (msec) metric
Hi Guys,
Can i edit the Response Time (msec) metric under the Listener Availability Notification rule to alert only if the response time is breaching the alerting threshold for 5 minutes,as in for 5 consecutive occurences when this metric is pooled ?
For example we can execute dbms_server_alert.set_threshold(.....
consecutive_occurrences=>5
for a metric like redo_generated_sec
Can we do this for Response Time (msec) metric under the Listener Availability Notification rule ?
I am also not seeing this metric listed under v$METRICNAME
Any ideas...
Regards,
SwanandI have no doubt this is it. I switched to the OID of the timeticks that the system has been up for and tried:
<CollectionItem NAME="Response">
<Schedule>
<IntervalSchedule INTERVAL="5" TIME_UNIT="Min"/>
</Schedule>
<Condition COLUMN_NAME="Status" CRITICAL="1" OPERATOR="LT"/>
</CollectionItem>
The corresponding snmpwalk retrieves:
-bash-3.00# ./snmpwalk -Os -v1 -c public 100.100.100.100 .1.3.6.1.2.1.1.3
sysUpTimeInstance = Timeticks: (26302086) 3 days, 1:03:40.86
Now I get a clock once in a while (it looks like its collecting) but then I revert to down. I assume that this structure is basically:
RetrievedValueForStatus OPERATOR CRITICAL triggers a CRITICAL alert and I could add another for WARNING
And then I'm making the assumption that "Running" is the state of CRITICAL or WARNING not being triggered?
I noticed Example 2-9 Default Collection File for Simple Server Alpha uses NO condition.
What happens if the system simply cannot be contacted, is there an assumption that the value is always available in these Conditions? For example, if I return the name of the system in the Snmp Fetchlet and SNMP cannot retrieve ANY values (because the system is down), would the CRITICAL condition be:
<Condition COLUMN_NAME="Status" CRITICAL="" OPERATOR="EQ"/>
I will keep going on trial an error
Thanks... -
Slow response time for radio buttons on Internet Explorer 7
Hi,
We're using ADF 11.1.1.4 on weblogic 10.3.4 on a Solaris 10 (sparc) platform. The architecture also uses OHS and Webcache 11.1.1.4.
One of our applications has a webpage that is composed of several tabs, inside each tab we have some questions with radio buttons. When a client responds all questions on the first tab it moves to the second, where the application loads the necessary questions, based on the answers provided on the first tab. Once the client finishes answering this tab it moves to the third one and so on.
The problem appears once the tabs are loaded. Each time the client clicks one of the radio buttons, Internet Explorer takes between 3 to 5 seconds to return control, and considering that a client might need to click dozens of radio buttons to complete a process, it becomes a very exhausting task. It's worth noting that the session information is persisted for each radio button, when we move between tabs all answers are kept even if we didn't saved the progress.
On the other side, if we use Google Chrome 16, we find that the webpage returns control to the user almost inmediately, when clicking the radio buttons the response time is usually at 1 second or less.
We've checked that the app server is not stressed, heap memory is nowhere near the maximum assigned and the used processor % is very low, so it does not seems to be a resource problem.
Is there any known issue with ADF 11.1.1.4 and IE7/8 that affects the browser's response time? Are there any guidelines or recommendations regarding how to make the radio button component work properly? Has anybody noticed this behavior in adf?
Thanks.I think that the most accurate description of the problem is that the autosubmit action of the radio button takes considerably longer in IE7 than in Chrome.
-
What exactly does the contrast ratio and response time mean?
Recently I have been browsing for external monitors and I noticed that two of the specifications for monitors are a contrast ratio and response time.
What does a contrast ratio mean? What does the response time mean? Is the response time the same as the frequency refresh rate (ie. 75 Hz)?
I was looking at the Thunderbolt Display specs and it has a contrast ratio of 1000:1 and a response time of 13ms, but another LED monitor that costs 1/3 the price has a contrast ratio of 5,000,000:1 and response time of 5ms. The resolution of the display does not matter too much for me. Would the cheaper monitor be a better choice for me if I play to mostly use the display for gaming/photo editing?You're welcome.
Would the cheaper monitor be a better choice for me if I play to mostly use the display for gaming/photo editing?
You can problem find lots of decent monitors with short response times for gaming. But I think (and this is just a guess, no basis in fact) that a decent monitor for photo editing may not be cheap and of course response time doesn't much matter so it may not make a good game monitor (depending on the kind of games you like to play of course -- angry birds would play on anything).
Also another thing to keep in mind are the two schools of thoughts on glossy monitors like the current 27" Apple monitors vs. non-glossy (anti-reflective) monitors. It's like religiion, And one group is not going to convience the other which is "better". It's a matter of taste I think. There's even a thread on this topic in these forums:
Why is Apple insisting on Glossy Displays?
I'm only mentioning this because if you want to do some photo editing there are some folks who do that stuff and claim they don't like glossy displays.
Maybe you are looking for
-
Reminders not working on iPhone and iPad, but are on MacBook Pro
My reminders on my MacBook Pro are showing up 24 hours in advance of the set time for that reminder, but they are not showing up on my iPad 3 and iPhone 5. I have to power the iPad and iPhone off for the reminders to show up in the notification cente
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When my iTunes offers to download the 10.6.3 software, I click "Download iTunes" and it still doesn't download. What do I do?
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How to run a program in background?
Hi abapers, I want to run a program in background using sm36 and sm37.But i am not aware of input in that tansaction.So kindly tell me the steps ho run a program in background. Regards Ansuman
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Content DB Search fails to find file
Search does not return the file when searching unless the search starts on the specific folder the file is in. When a search is performed at a container and or library level, the file is not found unless you perform the search at the /domain/containe