RE: memory problem - oracle 10203 on HPUX
Date: Sat, 19 Jan 2008 18:20:12 -0700
Since you mention RAC I suspect this is probably node eviction - the cause could be cpu utilization (not mentioned) or swap consumption preventing heart beat messages and consequently resulting in node eviction. Look at the ocssd.log on the surviving node. How many nodes in your cluster and how busy are the other nodes (cpu, swap)?
If my understanding of memory usage is correct (as seen in Solaris) the process maps the SGA and is part of its virtual space and has to reserve swap proportional to it. I address that using shared servers (MTS) since only a few processes (in your case 50) need be active and not the 1500 since you can get away with about 75 shared servers processes (if you are not already using this capability).
The system logs or the crs/css logs will give you that information. The other thing to look for is the progressive build up and usage of swap.
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From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ujang Jaenudin
Sent: Saturday, January 19, 2008 5:36 PM To: oracle-l
Subject: memory problem - oracle 10203 on HPUX
I have a machine (RAC configuration) 10.2.0.4 on HPUX - PARISC. in a node I have 38GB physical memory, 8 processors. the machine could not run with asynchronous IO, so I set io slave to 8, and dbwr to 1.
at AWR report, it said that 2GB memory for PGA is enough, and 12GB of
SGA mostly enough.
concurrent user is 1000 until maximum 1500 users connected. at one time only 30-50 concurrent active with OLTP transaction.
at the OS perspective, it said that mostly 90-100% memory has been used, even when high load, 50% of the swap will be used also. almost every 20 days, the server is rebooted itself, I think this is due to lack of memory....
why between OS and oracle side there has much big different of memory usage???
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http://www.freelists.org/webpage/oracle-l Received on Sat Jan 19 2008 - 19:20:12 CST