Re: vacuumdb -a -f

You might want to try doing a reindexdb -a -e (reindexdb is in the
contrib directory of your pg source).  The first time I ran this, I
gained back a significant amount of space.

I now run a vacuumdb -v -f -a and then a reindexdb -a -e every weekend
to have PostgreSQL give back as much space as it can.  I have ended up
doing this do to space and i/o constraints.

Give the reindexdb script a try and see if you don't get your space back.

HTH,

Chris

On 8/17/05, Guido Barosio <gbarosio@gmail.com> wrote:
> How are you finding out the DB size?
>
> G.-
>
>
>
> On 8/17/05, D Kavan <bitsandbytes88@hotmail.com> wrote:
> > Hi,
> >
> > Thanks for the tips.
> >
> > Unfortunatley for me,  even after started doing vacuumdb -a 3 times a day
> > and increasing fsm dramatically , the size of the database won't go down
> > even 1 MB.  It's stil at 5.6 GB, size after restore = 4 GB.   I even did a
> > stop/start instead of a re-load to make sure the settings took affect.
> Would
> > a reboot help?
> >
> > max_fsm_pages = 16000001
> > max_fsm_relations = 1000000
> >
> > shared_buffers = 65536
> > work_mem = 32768
> > maintenance work mem = 786432
> >
> > checkpoint_segments = 18
> >
> >
> > ##/etc/sysctl.conf
> >
> > nel.shmall = 524288
> > #kernel.shmall = 2097152
> > #kernel.shmmax = 2147483648
> > #kernel.shmmax = 1073741824
> > kernel.shmmax = 6979321856
> > kernel.shmmni = 4096
> > kernel.sem = 250 32000 100 128
> > fs.file-max = 65536
> > net.ipv4.ip_local_port_range = 1024 65000
> > vm.overcommit_memory = 2
> >
> >
> > ~DjK
> >
> >
> >
> >
> >
> > >From: Tom Lane <tgl@sss.pgh.pa.us>
> > >To: "D Kavan" < bitsandbytes88@hotmail.com>
> > >CC: pgsql-admin@postgresql.org
> > >Subject: Re: [ADMIN] vacuumdb -a -f Date: Mon, 15 Aug 2005 21:31:01 -0400
> > >
> > >"D Kavan" <bitsandbytes88@hotmail.com> writes:
> > > > Even though I run vacuumdb -a -f every night with no exceptions or
> > >problems,
> > > > my database size remains 5.6 GB.  After I do a dump/restore, the new
> > > > database size is 4.0 GB.  How could that be possible?
> > >
> > >The extra 1.6GB probably represents the amount of junk you generate in
> > >one day.  So, forget the -f and instead do plain vacuums on a more
> > >frequent basis.  Make sure your FSM settings are large enough, too.
> > >
> > >                       regards, tom lane
> >
> >
> >
> > ---------------------------(end of
> broadcast)---------------------------
> > TIP 6: explain analyze is your friend
> >
>
>
>
> --
> "Adopting the position that you are smarter than an automatic
> optimization algorithm is generally a good way to achieve less
> performance, not more" - Tom Lane.