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High system cpu (vs. user cpu)

This is a discussion on High system cpu (vs. user cpu) within the Oracle Database forums, part of the Database Server Software category; --> One of our 9.2.0.6 databases running on RedHat 4.0 has been using a lot of 'system' cpu today. 12:48:22 ...


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Old 02-25-2008, 04:29 AM
NetComrade
 
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Default High system cpu (vs. user cpu)

One of our 9.2.0.6 databases running on RedHat 4.0 has been using a
lot of 'system' cpu today.

12:48:22 PM CPU %user %nice %system %iowait %irq %soft
%idle intr/s
12:48:24 PM all 47.07 0.00 47.69 0.00 0.25 3.00
2.00 6767.84
12:48:26 PM all 44.25 0.00 50.88 0.00 0.25 3.12
1.50 6765.17
12:48:28 PM all 45.58 0.00 49.94 0.00 0.50 2.74
1.25 7071.00
12:48:30 PM all 46.88 0.00 47.63 0.00 0.50 3.37
1.62 7268.66

All of our db's use MTS, but what's weird (and unique) about this one,
is that it has 3000+ connections into it, and the dispatchers (not the
servers as on other boxes) that are taking up the 'top' cpu
utilization.

Usually that's an indication of a 'spinning' dispatcher to me (and
usually I would find a session in waiting for 'virtual circuit status'
that I'd have to kill to 'free up' the dispatcher).. but today
something is just different.. can't figure it out.. the box is under
higher load then usual, but not 3-4x (seeing 3-4x higher runq)
anyone seen this? any clue?

Thanks,
andrey
........
We run Oracle 9.2.0.6 on RH4 AMD
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