Hello All.
Been monitoring this list for some time, never posted before so here goes.
We have a Trucluster (v 1.5) system comprising two AS8400 5/625 systems
running Tru64 V4.0D each with 4GB memory and 12GB swap. They are running Sap
R3 v4.0B ( patch level ) with an Oracle database ( v 8.0.4 ). From time to
time ( every few days ) if a large report gets generated ( ie 1GB ) we see a
memory bottleneck ( vmstat ) with a high rise in page outs ( basically from
0 up to > 10K ). It is at this point that the system "freezes" for up to 25
minutes - no-one can login can't even get system console. During this time
nothing gets logged by any processes - we have vmstat and iostat cron jobs
running every 5 minutes, system monitoring with patrol - all logs show last
entry just prior to the freeze and start logging again just after the system
unfreezes. As such we are a bit in the dark as to what actually happens
during the freeze. Other resources seem fine during the freeze - memory
paging is the only one that goes through the roof.
Things are getting a bit hot regarding this issue and I would really
appreciate anyone's opinions/thoughts/abuse/anything.....
Thanks in advance
Jeremy
PS - Sorry if I have missed anything etc... Give ma a yell if I can provide
anything - stats etc.
Received on Fri Sep 17 1999 - 05:53:47 NZST