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vmtune and memory pools

This is a discussion on vmtune and memory pools within the AIX Operating System forums, part of the Unix Operating Systems category; --> In the Performance Overview of the Virtual Memory Manager (VMM) section of the Performance Management Guide it states the ...


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Old 01-05-2008, 06:06 AM
i95dblr@gmail.com
 
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Default vmtune and memory pools

In the Performance Overview of the Virtual Memory Manager (VMM) section
of the Performance Management Guide it states the following: "Real
memory is split into evenly sized memory pools based on the number of
CPUs and the amount of RAM... use the vmtune -m <number of memory
pools> command to change the number of memory pools that will be
configured at system boot." When I run the vmtune -A command I get the
following information:

3145728 memory pages
2935008 lruable pages
4505 free pages
3 memory pools
578276 pinned pages
80.1 maxpin percentage
20.0 minperm percentage
80.0 maxperm percentage
29.0 numperm percentage
853839 file pages
0.0 compressed percentage
0 compressed pages
31.7 numclient percentage
80.0 maxclient percentage
931861 client pages
0 remote pageouts scheduled
0 pending disk I/Os blocked with no pbuf
0 paging space I/Os blocked with no psbuf
2740 filesystem I/Os blocked with no fsbuf
0 client filesystem I/Os blocked with no fsbuf
6160 external pager filesystem I/Os blocked with no
fsbuf

I have 6 processors on the server:

proc0 Available 00-00 Processor
proc1 Available 00-01 Processor
proc2 Available 00-02 Processor
proc3 Available 00-03 Processor
proc6 Available 00-06 Processor
proc7 Available 00-07 Processor

The svmon command shows:
size inuse free pin virtual
memory 3145728 3142606 3122 578322 2431895
pg space 3145728 380654

work pers clnt lpage
pin 578322 0 0 0
in use 2210383 0 932223 0

What effect to memory would there be if the number of memory pools were
increased to 6?

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