Re: [ADMIN] PostgreSQL 9.3 ERROR - Mailing list pgsql-admin

From Stephen Frost
Subject Re: [ADMIN] PostgreSQL 9.3 ERROR
Date
Msg-id 20170118201638.GD18360@tamriel.snowman.net
Whole thread Raw
In response to [ADMIN] PostgreSQL 9.3 ERROR  ("Ferrell, Denise D CTR NSWCDD, H11" <denise.ferrell.ctr@navy.mil>)
List pgsql-admin
Greetings Denise,

* Ferrell, Denise D CTR NSWCDD, H11 (denise.ferrell.ctr@navy.mil) wrote:
> Running on Linux...has anyone else encountered this?
>
> Receiving the following error in the pg_log file:
>
> "could not extend the "pg_tblspc/23917/PG_9.3_201306121/16385/55041.5": wrote only 4096 of 8192 bytes at block
722183"

That error indicates that the filesystem ran out of disk space.

> I was under the impression that PostgreSQL allocates 1G per tablespace file.

That is incorrect.  In PostgreSQL, a "tablespace" is a directory.  Every
table in PostgreSQL consists of a set of files.  None of the individual
files for a PostgreSQL table will be larger than 1G, but PostgreSQL will
use multiple files when it reaches 1G in size.

In the above case, the table/index with relfilenode 55041 in the
database with oid 16385 has grown to be over 5G in size.  The files:

55041
55041.1
55041.2
55041.3
55041.4
55041.5

are all associated with that table/index.

Thanks!

Stephen

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