How do you view disk waits? -----Original Message----- From: tclug-list-bounces at mn-linux.org [mailto:tclug-list-bounces at mn-linux.org] On Behalf Of Chris Schumann Sent: Tuesday, February 17, 2004 2:23 PM To: Twin Cities Linux User Group Subject: [TCLUG] Finding Bottlenecks Hi all, My company has a server that has uhm... served us well for years, but we are now developing an Apache/Tomcat/PHP/MySQL application that bogs it down somewhat. (Netfinity 5000, dual PIII 550MHz, 832MB RAM, Ultra160 SCSI disks) Right now, when we use the administrative pages, one CPU gets very busy, so it's easy to see it's time for an upgrade. However, in the future, it may not be the CPU but say, disk I/O or memory bandwidth causing the slowdown. And I don't even know how to find out which might be the cause. Are those details logged? Can I use some log tracker or monitoring system to say things like this: Hey! The CPU was 100% busy for a stretch of 300 seconds, and spent 1.2% of the day at full use. Hey! There were a maximum of 12 processes waiting for disk today, and a stretch of 30 seconds with more than 1. Or can I use something like top to view disk waits, memory utilization and CPU usage? Oh and network bandwidth? Our server is behind a T1 and that may become a bottleneck too. Chris _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.581 / Virus Database: 368 - Release Date: 2/9/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.581 / Virus Database: 368 - Release Date: 2/9/2004 _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list