Thanks for the reply. I found no strange processes or queries while load average was at peak. IO also didn't change. Some more slow queries were logged, but not many. I think sharing the VM with other customers doesn’t have much to do with this. I checked my other servers too, and only those that have postgresql have the load average issue. Generally it doesn’t impact my system much, but when there are slow queries, this issue just makes everything worse.
Nhan Nguyen System Engineer MB: (+84) 934 008 031 Skype: live:ducnhan813 > On Nov 4, 2016, at 4:03 PM, John R Pierce <pie...@hogranch.com> wrote: > > On 11/4/2016 1:45 AM, Nhan Nguyen wrote: >> >> The load average of the instance increase every 105 minutes even without any >> database. I’ve checked the scheduled jobs but couldn’t find anything >> suspicious. When the load average was at peak, I couldn’t see any process >> consuming resources. This happens on all my servers that has postgresql >> installed, even after I purge postgresql. Has anyone seen this before > > load average doesn't mean much other than the number of processes waiting for > a resource. does the IO latency spike at this time, too? > > with AWS, your system is sharing the vendors virtual machine environment with > other customers, and performance is pretty much out of your control. > > -- > john r pierce, recycling bits in santa cruz > > > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general
