Обсуждение: Max File size per Table (1G limit??)
I just browsed to my $PGDATA location and noticed that there are some tables which has ending of .1 # ls -lahS | egrep '(24694|24702|24926)' -rw------- 1 postgres postgres 1.0G Sep 3 22:56 24694 -rw------- 1 postgres postgres 1.0G Sep 3 22:52 24702 -rw------- 1 postgres postgres 1.0G Sep 3 22:58 24926 -rw------- 1 postgres postgres 800M Sep 3 22:57 24694.1 -rw------- 1 postgres postgres 161M Sep 3 22:52 24702.1 -rw------- 1 postgres postgres 12M Sep 3 22:58 24926.1 I'm wondering what are these since I've not set up table partitioning just yet.
On 9/3/07, Ow Mun Heng <Ow.Mun.Heng@wdc.com> wrote: > I just browsed to my $PGDATA location and noticed that there are some > tables which has ending of .1 > > # ls -lahS | egrep '(24694|24702|24926)' > -rw------- 1 postgres postgres 1.0G Sep 3 22:56 24694 > -rw------- 1 postgres postgres 1.0G Sep 3 22:52 24702 > -rw------- 1 postgres postgres 1.0G Sep 3 22:58 24926 > -rw------- 1 postgres postgres 800M Sep 3 22:57 24694.1 > -rw------- 1 postgres postgres 161M Sep 3 22:52 24702.1 > -rw------- 1 postgres postgres 12M Sep 3 22:58 24926.1 > > I'm wondering what are these since I've not set up table partitioning > just yet. > > postgres uses datafiles from up to 1GB, if a table has more data than that limit then postgres creates more files. http://www.postgresql.org/docs/8.2/static/storage-file-layout.html -- regards, Jaime Casanova "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs and the universe trying to produce bigger and better idiots. So far, the universe is winning." Richard Cook
Ow Mun Heng <Ow.Mun.Heng@wdc.com> writes: > I just browsed to my $PGDATA location and noticed that there are some > tables which has ending of .1 TFM has some useful background knowledge for that sort of thing: http://www.postgresql.org/docs/8.2/static/storage.html regards, tom lane
On Tue, 2007-09-04 at 00:51 -0400, Tom Lane wrote: > Ow Mun Heng <Ow.Mun.Heng@wdc.com> writes: > > I just browsed to my $PGDATA location and noticed that there are some > > tables which has ending of .1 > > TFM has some useful background knowledge for that sort of thing: > http://www.postgresql.org/docs/8.2/static/storage.html > Thanks for the pointers. I now understand it a _bit_ better. BTW, besides the reason for compatibility for filesystems, does this give the ability for PG to only read through the file which has the data instead of transversing from main to .1 to .2 etc?? Stupid question maybe..