From: | "Plugge, Joe R(dot)" <JRPlugge(at)west(dot)com> |
---|---|
To: | Thomas SIMON <tsimon(at)neteven(dot)com>, "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org> |
Subject: | Re: Huge increase of database partition |
Date: | 2013-10-24 14:26:50 |
Message-ID: | BD69807DAE0CE44CA00A8338D0FDD083036B219B12@oma00cexmbx03.corp.westworlds.com |
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Thread: | |
Lists: | pgsql-admin |
Yes, did you perhaps have a long running query that was doing lots of sorts, if so it creates as many 1 GB temp files as it takes to complete the sort, and they go into your data partition by default. Once the query completes, postgres cleans them up.
From: pgsql-admin-owner(at)postgresql(dot)org [mailto:pgsql-admin-owner(at)postgresql(dot)org] On Behalf Of Thomas SIMON
Sent: Thursday, October 24, 2013 9:21 AM
To: pgsql-admin(at)postgresql(dot)org
Subject: [ADMIN] Huge increase of database partition
Hi the list,
Yesterday, i have had a big problem of disk space on my server, running postgresql 9.0.13; with streaming replication.
Between 6pm and 7-30pm, i went from 45% used space to 99% (100% ?) used space on my /data partition (who contains my postgresql/9.0/main/base ; but does not contains the WAL; they are deported on an other partition). - seen only after with munin -
Juste after that - still according to munin- , the partition suddently decreases to its normal value (around 45%)
This peak represents around 165 Go of data ! ; beacause my partition size is 315 Go.
I can't explain why, it's the first time i have something like this. Usually, the size of the partition is very stable ; and grows very slowly.
Still with munin, i see that in this period, the blocks read per second increases from around 20k to 80k, and i see that the disk utilisation is around 100%, which confirms that postgres wrote a lot of data.
I don't understand how this can happen, have you ever seen things like this ?
Thanks in advance,
Thomas
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