On Fri, October 25, 2013 3:25 pm, li...@sbt.net.au wrote: > On Fri, October 25, 2013 1:36 pm, Michael Chesterton wrote: > >> I know it's resolved, but look at the 6th column in the original post. >> 90+% iowait, 90% of the time, the cpu is waiting for IO.
Michael, thanks again this morning I got a 'brief outage' with monitoring down/up advices like below, looking at cacti 'load' chart, drop in data output around 5am, followed by big spike around 6am when graph re-starts (size of spike might be the dropped data from 5am till graph resumed, perhaps) and, iowait again: ----------- # sar -s 01:00:00 -e 07:30:00 Linux 2.6.32-358.23.2.el6.x86_64 10/26/2013 _x86_64_ (2 CPU) 01:00:01 AM CPU %user %nice %system %iowait %steal %idle 01:10:02 AM all 4.04 0.00 0.92 28.83 0.00 66.20 01:20:02 AM all 6.43 0.01 1.29 33.42 0.00 58.85 01:30:01 AM all 5.88 0.01 1.24 26.82 0.00 66.05 01:40:01 AM all 4.13 0.00 0.91 2.08 0.00 92.88 01:50:01 AM all 4.07 0.01 0.85 3.17 0.00 91.90 02:00:01 AM all 4.16 0.01 0.83 1.30 0.00 93.71 02:10:03 AM all 4.42 0.01 0.94 28.86 0.00 65.77 02:20:01 AM all 4.16 0.01 0.92 11.04 0.00 83.88 02:30:01 AM all 3.99 0.00 0.80 5.63 0.00 89.57 02:40:01 AM all 4.00 0.00 0.93 3.09 0.00 91.98 02:50:01 AM all 4.03 0.00 0.97 2.20 0.00 92.79 03:00:01 AM all 3.72 0.01 0.83 1.00 0.00 94.45 03:10:04 AM all 4.68 3.48 1.24 42.44 0.00 48.15 03:20:03 AM all 5.26 0.28 1.53 61.01 0.00 31.92 03:30:01 AM all 4.36 0.00 0.91 15.64 0.00 79.08 03:40:02 AM all 6.97 0.01 0.99 19.77 0.00 72.26 03:50:01 AM all 4.05 0.00 0.90 11.24 0.00 83.81 04:00:01 AM all 3.94 0.00 0.95 3.80 0.00 91.31 04:10:01 AM all 4.26 0.00 1.08 23.94 0.00 70.71 04:20:01 AM all 4.42 0.00 1.03 11.86 0.00 82.68 04:30:01 AM all 3.95 0.01 0.85 2.86 0.00 92.32 04:40:01 AM all 3.88 0.01 0.80 2.25 0.00 93.06 04:50:01 AM all 4.06 0.00 1.12 6.39 0.00 88.42 05:00:01 AM all 3.83 0.00 0.77 9.31 0.00 86.08 05:10:17 AM all 1.93 0.00 0.67 94.88 0.00 2.51 05:20:15 AM all 0.64 0.00 0.70 98.67 0.00 0.00 05:30:02 AM all 7.86 0.01 1.24 89.18 0.00 1.70 05:40:01 AM all 3.93 0.00 0.79 19.51 0.00 75.76 05:50:01 AM all 3.58 0.01 0.72 6.91 0.00 88.78 06:00:01 AM all 3.86 0.00 0.79 5.55 0.00 89.79 06:10:01 AM all 4.30 0.01 0.80 9.41 0.00 85.48 06:20:01 AM all 4.84 0.00 0.78 4.08 0.00 90.30 06:30:01 AM all 4.67 0.01 0.78 2.50 0.00 92.05 06:40:01 AM all 3.79 0.01 0.81 1.90 0.00 93.49 06:50:01 AM all 3.80 0.01 0.79 2.20 0.00 93.21 07:00:01 AM all 3.72 0.00 0.77 1.83 0.00 93.68 07:10:01 AM all 3.89 0.00 0.77 3.80 0.00 91.54 07:20:01 AM all 3.75 0.01 0.70 2.28 0.00 93.27 Average: all 4.23 0.10 0.91 18.42 0.00 76.33 ----------- Server: vps Date: Saturday, 26 October 2013 5:15:37 AEST Notification: vps has lost service Proc-VMware-vmmemctl. followd by Date: Saturday, 26 October 2013 5:17:33 AEST Notification: vps has regained service Proc-VMware-vmmemctl. ------------ -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
