From: sreenath sarikonda (sreeredhat@yahoo.com)
Date: Tue May 11 2004 - 16:16:43 EDT
Hi Gurus,
Even though this is a basic question I tried my best to answer it by myself.I also looked into forums which had questions related to prstat.Many suggested to use RMCmemtool's.But the readme suggests not to use those softwares on production machines.
Below are the outputs of " prstat -t oracle" and " vmstat 1 5
My questions are:
1) How come RSS be 100% and vmstat report 26 GB free.How should I interpret memory data given by this command.The main objective is "Capacity Planning"
2)Can I rely on prstat command for %CPU usage by each user.
3)Is there a better way to exactly come up with how much oracle process uses memory in KiloBytes.( I read that ps gives memory in pages).I know RMC tools but I cannot install on our server.Also I checked pmap gives similar numbers.
I guess someone might have had this problem before.Any suggestions would be greatly appreciated.
Thank you,
Sree.
NPROC USERNAME SIZE RSS MEMORY TIME CPU
553 oracle 1003G 991G 100% 8:17.35 14%
36 root 124M 72M 0.0% 2:41.56 0.0%
1 daemon 2536K 1752K 0.0% 0:00.00 0.0%
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vmstat 1 5
procs memory page disk faults cpu
r b w swap free re mf pi po fr de sr m0 m1 m3 m6 in sy cs us sy id
0 0 0 77267064 26474728 738 1939 1369 4 4 0 0 0 0 0 6 3688 1804 2641 30 10 60
0 0 0 75450216 25784200 0 7 0 0 0 0 0 0 0 0 1 311 172 259 6 0 93
0 0 0 75450216 25784200 6 0 0 0 0 0 0 0 0 0 0 425 263 329 1 3 96
0 0 0 75450216 25784200 0 0 0 0 0 0 0 0 0 0 0 168 62 161 0 1 99
0 0 0 75450216 25784200 0 0 0 0 0 0 0 0 0 0 1 225 152 212 0 0 100
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