From: alan.nguyen@au.transport.bombardier.com
Date: Sun Aug 25 2002 - 23:40:34 EDT
Hi Tru64 Managers,
We have a number of servers that we'd like to monitor & adjust their performance
in CPU, Memory & I/O.
The servers are on UNIX OS 4.0F with latest patch. We use tools such as,
collect, Performance Manager. top, vmstat, iostat, xload, netstat, mrtg to
monitor and collect data.
What we'd like to know is what are the facts that we could judge that the
servers are lacking of Memory, I/O and CPU
For Memory, if the processes page out & free memory is low then this may
indicate the lack of memory, is it correct ? How do we determine/model how much
consitency of the pageout or how much time the system does the pageout, then we
could conclude that the system is lacking of memory. Can we say that whenever
the pageout occurs then the system is lacking of memory.
How we determine/model the swapout ? the ps command shows which process got
swapped out as a W indicates in (s) status column.
How do we determine the I/O got a problem ?
For CPU performance: is it correct that what a CPU is paid for is it MUST be
used for more than 80%
Anyone has any experience/opinion , please help.
Thanks.
Alan.Nguyen@au.transport.bombardier.com
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