Re: Determining cause of system slowdowns
The Donald Cowart <[email protected]>
| Newsgroups | gmane.org.user-groups.jaxlug |
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| Message-ID | <CAFmUSyxKbjLiLg-Pou0vA1vNtJV+05GDt+TvT7TxVDwX_iFEWg@mail.gmail.com> |
Can you get the output from top during a slowdown or just after? Also, is the boxes' function a webserver, fileserver, mathematical processing, etc? Was the box rebooted after the patching? Something that may help run "top -b" in a while loop (with a sleep in between runs) and dump it to a file or series of files, so you've got snapshots over time of the system performance to help troubleshoot this. --Donald On Wed, Feb 15, 2012 at 10:49 AM, Dean, Mike <mike-ovVSJprB0qbqlBn2x/[email protected]> wrote: > Hello all, hoping you can help. We have a RedHat box that two days ago > starting having periods of slow performance. The slow down is bad enough > that you can see it when trying to type at a terminal and some processes, > such as SNMP, don't respond. Users have also been disconnected. > > The last change that was made was applying the normal monthly patches on > 2/7 (the problem only started showing up yesterday). According to the > information from 'top', the system seems to be fine. A typical snapshot > looks like this: > > Tasks: 282 total, 8 running, 274 sleeping, 0 stopped, 0 zombie > Cpu(s): 1.1%us, 0.3%sy, 0.0%ni, 98.5%id, 0.0%wa, 0.0%hi, 0.0%si, > 0.0%st > Mem: 3909268k total, 1669580k used, 2239688k free, 231832k buffers > Swap: 6094840k total, 0k used, 6094840k free, 972756k cached > > Any ideas on where to look? > > Thanks! > > Mike -- Donald Cowart http://www.rdex.net/ --------------------------------------------------------------------- Archive http://marc.info/?l=jaxlug-list&r=1&w=2 RSS Feed http://www.mail-archive.com/[email protected]/maillist.xml Unsubscribe [email protected]