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тАО12-04-2005 05:24 PM
тАО12-04-2005 05:24 PM
Following result is shown after executing swapinfo
# swapinfo -atm
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 6144 277 5867 5% 0 - 1 /dev/vg00/lvol2
reserve - 5867 -5867
memory 2336 2209 127 95%
total 8480 8353 127 99% - 0 -
Could anybody tell what does reserve column indicate? and 99% utilization leads to a problem "Out of memeory" while application is running.
Note: if physical memory is 3GB then in above swapinfo what does memory column indicate?
Rgds,
Mehul
Solved! Go to Solution.
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тАО12-04-2005 05:35 PM
тАО12-04-2005 05:35 PM
Re: swapinfo information
From "man swapinfo", the reserve column means the paging space on reserve which is needed by processes that r currently running, but that has not yet been allocated from one of the paging areas.
the memory seems quite low, do a vmstat to verify how bad swapping is occurring:
# vmstat 2 15
15 2-seconds interval
regards.
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тАО12-04-2005 06:50 PM
тАО12-04-2005 06:50 PM
Re: swapinfo information
Best explanation I know is on
ftp://eh:spear9@hprc.external.hp.com/memory.htm
I would advise anybody to bookmark this site
Steve Steel
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тАО12-04-2005 06:55 PM
тАО12-04-2005 06:55 PM
Re: swapinfo information
With 3GB of ram, dbc_max_pct of 20 or 25% should be fine.
Post a vmstat -S 2 10
-S Report the number of processes swapped in and out (si and so)
You may need to add more memory to the system - or add more swap space...
Rgds...Geoff
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тАО12-06-2005 01:06 AM
тАО12-06-2005 01:06 AM
Re: swapinfo information
The "memory" row indicates that you have pseudo-swap or "lazy" swap mode enabled. (default on HP-UX). Up to 75% of physical memory can be dedicated to use as paging space. This is key on large memory systems. It's tough to set aside 2x physical memory (traditional recommendation) for paging space on a system with 128GB of RAM!
You can disable this with a kernel parameter change, but unless your app routinely chews up a ton of memory, I'd leave it set at the default.
-tjh
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тАО12-13-2005 01:51 PM
тАО12-13-2005 01:51 PM
Re: swapinfo information
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тАО12-13-2005 02:36 PM
тАО12-13-2005 02:36 PM
Re: swapinfo information
We are still facing "Out of memory" problem from last 10 days.Either we have to abort the instance or kill user session which is not ideal solution.
Pl. suggest everlasting solution?
Waiting for immediate response.
Regards,
Mehul
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тАО12-13-2005 03:31 PM
тАО12-13-2005 03:31 PM
Re: swapinfo information
1) Reduce the memory usage on the system
2) Upgrade RAM
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тАО12-13-2005 03:33 PM
тАО12-13-2005 03:33 PM
Re: swapinfo information
How many instances on this system??
what are the following kernel settings??
maxssiz
maxssiz_64bit
maxdsiz
maxdsiz_64bit
maxtsiz
maxtsiz_64bit
shmmax
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тАО12-13-2005 04:05 PM
тАО12-13-2005 04:05 PM
Re: swapinfo information
Are you running an Oracle Database?
maybe you can also perform some tuning at this level also..
kind regards
yogeeraj