| From: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
|---|---|
| To: | Ogden Brash <info(at)litika(dot)com> |
| Cc: | pgsql-performance(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Some observations on very slow pg_restore operations |
| Date: | 2019-10-04 06:03:00 |
| Message-ID: | 20191004060300.GA11241@telsasoft.com |
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| Thread: | |
| Lists: | pgsql-performance |
What is the state of KSM/THP? Did you try disabling them ? I've seen these
can cause high iowait (although that was a virtual environment). It would be
interesting to see vmstat output.
tail /sys/kernel/mm/ksm/run /sys/kernel/mm/transparent_hugepage/khugepaged/defrag /sys/kernel/mm/transparent_hugepage/enabled /sys/kernel/mm/transparent_hugepage/defrag
https://www.postgresql.org/message-id/20170718180152.GE17566%40telsasoft.com
I realize the postgres params don't seem related to the difference between
local/remote/NFS, but did you see all these ?
https://www.postgresql.org/docs/current/populate.html
Justin
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