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тАО05-09-2011 01:42 PM
тАО05-09-2011 01:42 PM
How to monitor Linux RAM under Linux.
I have oracle database on linux server with 32GB RAM for oracle I have 10GB and when I start the database on linux server I have free only 2GB.
Question is how to calcutate on which process consume ram on OS.
I have oracle database on linux server with 32GB RAM for oracle I have 10GB and when I start the database on linux server I have free only 2GB.
Question is how to calcutate on which process consume ram on OS.
Solved! Go to Solution.
3 REPLIES 3
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тАО05-10-2011 02:53 AM
тАО05-10-2011 02:53 AM
Re: Monitor RAM on Linux Redhat
Hi,
can you provide more detail. You can use 'top' to show you the highest consumers of RAM/CPU/resource on the running system.
Have you checked to see if the machine is swapping?
regards
can you provide more detail. You can use 'top' to show you the highest consumers of RAM/CPU/resource on the running system.
Have you checked to see if the machine is swapping?
regards
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тАО05-10-2011 11:27 AM
тАО05-10-2011 11:27 AM
Re: Monitor RAM on Linux Redhat
Confirm Oracle's use of memory via:
ipcs -am
This will show the segments allocated for Oracle and all other users of Shared Memory.
man ps
look for options there that display memory information for each process.
Hth,
-klb
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тАО05-11-2011 05:22 AM
тАО05-11-2011 05:22 AM
Solution
Peruse, analyze and deduce via the tools:
free
vmstat
cat /proc/meminfo
ipcs -m
Oracle is quite agressive is using free memory as cache. No matter how large memory you have configured -- your free memory in most tools will show very low available memory -- and the reason -- cache.
Post your output from the aboe tools and people in the forum can expound.
free
vmstat
cat /proc/meminfo
ipcs -m
Oracle is quite agressive is using free memory as cache. No matter how large memory you have configured -- your free memory in most tools will show very low available memory -- and the reason -- cache.
Post your output from the aboe tools and people in the forum can expound.
Hakuna Matata.
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