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тАО09-24-2007 07:32 PM
тАО09-24-2007 07:32 PM
Here i am facing a problem on HP Tru64 Server where memory urtilization is more than the 99% and swap utilization is only 6%, i am attaching the vmstat -p output and swapon output.
Please suggest me where my all memories are utilized. also how to make it normal.
Total Physical Memory = 8192.00 M
= 1048576 pages
Physical Memory Clusters:
start_pfn end_pfn type size_pages / size_bytes
0 885 pal 885 / 6.91M
885 1048567 os 1047682 / 8185.02M
1048567 1048576 pal 9 / 72.00k
Physical Memory Use:
start_pfn end_pfn type size_pages/size_bytes
885 1057 scavenge 172 / 1.34M
1057 2216 text 1159 / 9.05M
2216 2480 data 264 / 2.06M
2480 2979 bss 499 / 3.90M
2979 3270 kdebug 291 / 2.27M
3270 3277 cfgmgmt 7 / 56.00k
3277 3279 locks 2 / 16.00k
3279 3293 pmap 14 / 112.00k
3293 6073 unixtable 2780 / 21.72M
6073 6265 logs 192 / 1.50M
6265 30638 vmtables 24373 / 190.41M
30638 1048567 managed 1017929 / 7952.57M
=====================
Total Physical Memory Use:1047682 / 8185.02M
Managed Pages Break Down:
free pages = 4816
active pages = 130373
inactive pages = 100738
wired pages = 113329
ubc pages = 668845
==================
Total = 1018101
WIRED Pages Break Down:
vm wired pages = 11841
ubc wired pages = 6
meta data pages = 31358
malloc pages = 60076
contig pages = 3769
user ptepages = 4854
kernel ptepages = 1051
free ptepages = 10
==================
Total = 112965
Swap partition /dev/disk/dsk15c (default swap):
Allocated space: 2222817 pages (16.96GB)
In-use space: 149081 pages ( 6%)
Free space: 2073736 pages ( 93%)
Total swap allocation:
Allocated space: 2222817 pages (16.96GB)
Reserved space: 361374 pages ( 16%)
In-use space: 149081 pages ( 6%)
Available space: 1861443 pages ( 83%)
Solved! Go to Solution.
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тАО09-24-2007 10:54 PM
тАО09-24-2007 10:54 PM
Re: memory utilization
You can tune the memory % used by UBC tuning the ubc_maxpercent kernel paramenter.
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тАО09-24-2007 11:31 PM
тАО09-24-2007 11:31 PM
Re: memory utilization
Can you post output of:
# sysconfig -q vm
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тАО09-25-2007 12:47 AM
тАО09-25-2007 12:47 AM
Re: memory utilization
If you have a real performance issue, you should describe that issue and the data you have collected. It is almost never as simple as VM use.
Without specific goals and tests that can be repeated to determine the results, changing tuning from the system defaults will only make problems worse.
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тАО09-25-2007 02:01 AM
тАО09-25-2007 02:01 AM
Re: memory utilization
then how can i proof that this is not an OS related problem and everything is ok from my side. or is there any problem in my server end???? please suggest!!!
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тАО09-25-2007 02:09 AM
тАО09-25-2007 02:09 AM
Re: memory utilization
Can you explain exactly what the problem is...?
What symptoms are you seeing with the application, other than all of the memory being used ?
Cheers,
Rob
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тАО09-25-2007 02:11 AM
тАО09-25-2007 02:11 AM
Re: memory utilization
So all unused memory (unused by applications) is used for caching.
This is normal. You are NOT having problem with server.
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тАО09-25-2007 02:33 AM
тАО09-25-2007 02:33 AM
Re: memory utilization
Have a nice day.
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тАО09-25-2007 02:48 AM
тАО09-25-2007 02:48 AM
Re: memory utilization
My server is having messaging with one of VAX server and there is no problem at all, but some time it got slow messaging response and when i checked all the CPU, SWAP, MEMORY and SWAP,, there is no difference in report from normal time.
network report also have no problem. but the application team is pointing that why system is utilising the 99.9% Memory which is same as that of normal time to.
Now what should be my course of action on this point.
how can i prove that memory utilisation that is 99.9% have no bad impact on applications running.
that all!!!! hope u all got my point...
Suggest!!>???
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тАО09-25-2007 04:44 AM
тАО09-25-2007 04:44 AM
Re: memory utilization
There are no easy ways to determine what is happening and if the response times match what can be expected from the system configuration.
The only technique I know is to use a tool like "collect" to monitor the system across a wide interval as the load and response changes. Note that any monitor tool also affects the system and runs the risk that the performance will degrade to an unacceptible state by running the tool.
Collecting the data is the easiest part of the problem. Analyzing it is the hard part and requires expert knowledge. I would get someone with more experience to handle that.