On Wed, Feb 22, 2012 at 2:17 PM, Toth, Csaba <[email protected]> wrote: > The CPU load was close to 0. Still we had very high load => I thought it can > be only HDD.
run "dstat -cdny" , check how much I/O is going to dsk, check the network I/O and also interrupts per second. Interrupts can cause a high load or just unresponsiveness and may not be related to disk I/O . Also run "iostat -d #" where # is the # of seconds between updates, e.g. iostat -d 3, and look at the tps column which will show you how many iops it's doing. A single 7200 sata drive will only give you ~100 IOPS of random I/O . You can also use htop, enable the io read rate and io write rate columns, sort by one of these columns to see if there are processes generating lots of I/O . You can use "dmidecode" to determine what sort of Dell it is. Also install OMSA to get access to the cli utilities like omreport and if you want, the web gui at https://localhost:1311 to see your disk subsystems. However, these won't really tell you if something is wrong with the controller (only if the firmware and driver versions are outdated). -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en
