Henry, I had a similiar situation occur recently on HPUX, Oracle 817. CPU was pegged out and users were complaining of taking over 5 minutes to quey one record (usually took 5 seconds). It was a matter of statistics not being present on certain schema. A quick analyze cleared it all up. Just an idea...
Scott Shafer San Antonio, TX 210.581.6217 > -----Original Message----- > From: Henry Poras [SMTP:[EMAIL PROTECTED]] > Sent: Wednesday, October 09, 2002 6:35 PM > To: Multiple recipients of list ORACLE-L > Subject: RE: cpu on AIX > > Dennis, > Users are complaining, and at least this time the guilty process seems to > be > an import from a database out of my control. What I am trying to do is > control how often this happens. It seems a bit strange that one moderate, > single threaded import should drain both CPUs on the server, so I was > trying > to see how much could be pinned on those processes (imp and associated > oracle shadow process)and how much was due to other use and poor > configuration. > > As I mentioned, both %wio (wa on vmstat AIX) and %idle were ~0. Everything > was split (kind of evenly 50-50 to 40-60) between %usr and %sys. Using ps > -o > pcpu I could pin about 30% of %CPU on the import. I am not sure if this > includes the associated system calls (io) from this process. I don't think > so. (I wasn't seeing my %CPU adding up to 100% earlier because I was > leaving > out the kernal processes. I needed a ps -k flag). > > Now I am seeing some other funky stuff (maybe related, maybe not. I > haven't > looked carefully for this before so I don't know) on the same machine. The > import ended and the %usr %sys breakdown was still 40-60. There are two > kproc processes (async IO???) each using 44.4%CPU. That's been unchanged > for > hours and the machine is not being heavily used. Also, some other > processes > are using 10-20%CPU which puts me up over 100% (I guess it really can give > 120%). > > I'll let you know what I find. > > Henry > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
