Re: [perf-discuss] IO problem on production server

2008-03-26 Thread johansen
> If they cannot be optimized you can get about a 12% performance bump > using UFS + directio > > http://blogs.sun.com/realneel/ Go re-read that blog entry: If you do not penalize ZFS with double checksums, you can note that we are within 6% of our best UFS number. So 6% gives

Re: [perf-discuss] IO problem on production server

2008-03-26 Thread Andre Lue
At a glance the system is reading on avg 80Mb/s and is approx 73% busy, with no % wait. What is the max throughput of this capability of filesystem? Has it been reached? If the max throughput has been reached its time to probly take a look at your queries to see if they can be further optimiz

[perf-discuss] IO problem on production server

2008-03-26 Thread SOMSAK PATTANAPRATEEP
my system is running oracle9i with ZFS and some statistic is strange. iostat output is show disk is busy then i run iotop for find out what's process consume io and sched is use more than other. please suggest me how to reduce disk busy many thanks Pao. [b]iostat output[/b] r/sw/s kr