Netweaver performance swap memory
Hello,
I run Netweaver 7 BI on Windows 2003 Server X64. I have 8 Gb of Memory.
After few minutes, Windows swaps : jlaunch using 4 GB of swap memory and kernel 3gb of swap memory.
This causes to slow down when accessing to SAP.
Any ideas to optimize this ?
Regards,
Chea-Lie
Hello Heng,
Greetings!
The main problem is SAP uses its memory parameters to maintain the buffers and these buffers are maintained by the profile parameters.
To find which of these buffers are low you will have to ST02 transaction and find the ones which have much swaps. SAP memory is classified into many varieties like ABAP program buffer, Screen Buffer, Table Buffer, Calendar..etc.
Double click on each of the buffers and find the current parameters from the button provided on the corresponding page. Search for SAP notes that could give you details on profile parameter maintenance for increased performance. Also find out whether the SAP ABAP system shows a low performance only when some of the user defined programs are running.
Maintaining the correct profile parameter values providing suitable buffer space for the SAP system could optimize the server performance issues.
For the Java system, I think you are not deploying any packages through Jlaunch. Also check the Virtual Memory of the SAP server, you would require a minimum of 20GB virtual memory for the normal performance of a SAP server with ABAP and Java instances. You also have memory parameters to be maintained for the J2EE engine.
Award points if the suggestion was useful.
Thank you
Regards,
Vineeth
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Hi all,
I having problem in BI 7.0 server for swap memory goes to RED color... I know some variables and paramaters, but I am not sure how to calculate (depend on 12GB physical memory)
Screenshot here... if anyone know how to fix that I really appriciated
http://www.flickr.com/photos/38842895@N04/4538676180/sizes/o/
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Here you can see which parameters designates the memory for this buffer area. Once buffer is exceeded it begins to SWAP.
this is not a bad thing unless you are seeing performance problems. Most performance problems are far deeper than this.
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use ST06 as well for overall usage amounts of swap.
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http://help.sap.com/saphelp_nw70/helpdata/en/34/d9c8b9c23c11d188b40000e83539c3/content.htm
Edited by: Augustus Cristicini on Apr 20, 2010 10:05 PM -
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Last edited by keizer (2010-04-10 23:00:14)1) replace swap with swapfile
http://wiki.archlinux.org/index.php/Swap
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vm.swappiness = 100
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Hi,
Version :10.2.0.1 and 11.2.0.1
Os :Aix 5/6
We often getting swap issues.It reached 95%.we have 120GB real memory and 45 GB swap space.The db size is 2.5TB.Some time the db went to hang state and we restarted the db.
DB level
Is it possible to find A QUERY which memory using whether real memory or swap memory?How much amount from it?
OS level
Is it possible to find how much memory A PROCESS using from real memory and swap memory?
Thanks.922884 wrote:
Hi,
Version :10.2.0.1 and 11.2.0.1
Os :Aix 5/6
We often getting swap issues.It reached 95%.we have 120GB real memory and 45 GB swap space.The db size is 2.5TB.Some time the db went to hang state and we restarted the db.
DB level
Is it possible to find A QUERY which memory using whether real memory or swap memory?How much amount from it?
OS level
Is it possible to find how much memory A PROCESS using from real memory and swap memory?
Thanks.SWAP is an OS operation & Oracle has NO knowledge about it.
OS moves "idle" processes to free up RAM.
do like below & wait for the 1 minute data collection to finish.
post FORMATTED results using tags
[code]
bcm@bcm-laptop:~$ vmstat 6 10
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 24 41488 124584 2292224 0 0 97 39 398 865 8 3 86 2
0 0 24 37756 124600 2296736 0 0 0 21 794 1825 6 4 89 1
0 0 24 42804 124616 2296752 0 0 0 19 683 1510 3 2 94 1
0 0 24 43060 124624 2296756 0 0 0 18 738 1669 4 2 94 1
0 0 24 43316 124640 2296760 0 0 0 21 732 1641 4 2 93 1
0 0 24 44564 124656 2296768 0 0 0 16 642 1376 3 1 95 1
0 0 24 44564 124684 2296760 0 0 0 63 686 1524 2 2 95 1
0 0 24 39464 124828 2296780 0 0 22 31 695 1536 4 3 93 1
0 0 24 39464 124844 2296796 0 0 0 27 696 1577 4 2 93 1
0 0 24 39340 124860 2296796 0 0 1 26 781 1784 6 3 90 1
[/code]
(si+so) should be less than (bi+bo)
Handle: 922884
Status Level: Newbie
Registered: Mar 22, 2012
Total Posts: 44
Total Questions: 22 (16 unresolved)
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Last edited by KAozdl (2014-07-20 00:52:16)i simply suposed it. My bad.
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[kaoz@Shiva ~]$ sudo sysctl vm.swappiness=100
Contraseña:
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100
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Attachments:
filter opt.PNG 29 KB -
Slow performance, weird memory usage, hanging when closing safari tab
Hi, i recently noticed that my MacBoo Pro was with low performance after some hours of use.
I'm a heavy user, so I try to monitor what might be causing it. What i note was:
After restart (or fresh start), my computer was ok;
I use applications like adobe Lightroom and VMWare Fusion;
Then I star feeling like Safari was too slow to open pages - I thought it was the internet link first, but even local webpages are slow. I notice that when a click to close a tab, it take almost 2 sec to do it. The same when click to open any link on that page.
I start the activity monitor, but my proc usage are low. Then, I notice the (weird) memory usage:
Take a look at "memory used". I closed all applications before take this screenshot. i've trying to identify what is consuming this memory, but.. no success.
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My HW information:
all my apps are updated.Memory usage was normal when you took that screenshot.
When you have the problem, note the exact time: hour, minute, second.
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console 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. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.
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