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How to monitor resources on Linux.

From: John R Allgood <jallgood(at)the-allgoods(dot)net>
To: pgsql-admin(at)postgresql(dot)org
Subject: How to monitor resources on Linux.
Date: 2007-08-28 14:46:23
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
Hello All

    I have some questions on memory resources and linux. We are
currently running Dell Poweredge 2950 with dual core opeterons and 8GB
RAM. Postgres version is 7.4.17 on RHEL4. Could someone explain to me
how to best monitor the memory resources on this platform. Top shows a
high memory usage nearly all is being used. ipcs -m shows the following
output. If I am looking at this correctly each of the postgres entries
represents a postmaster with the number of connections. If I calculate
the first entry it comes to around 3.4GB of RAM being used is this
correct. We have started running into memory issues and I think we have
exhausted all the memory on the system. I think the best approach would
be to add more memory unless someone can suggest other options.  We have
a 2 node cluster running about 10 separate postmasters divided evenly on
each node. Each postmaster is a separate division is our company if we
have a problems with one database not everyone is down.

0x0052ea91 163845     postgres  600        133947392  26
0x00530db9 196614     postgres  600        34529280   24
0x00530201 229383     postgres  600        34529280   21
0x005305e9 262152     postgres  600        4915200    3
0x005311a1 294921     postgres  600        34529280   28
0x0052fe19 327690     postgres  600        4915200    4


John Allgood - Systems Admin
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