Re: Load Balancing/Multiple Postgres Machines

On November 29, 2004 11:30 am, Joshua D. Drake wrote:
> Adile Abbadi wrote:
> > Hi all,
> >
> > Not sure if this has been asked before - it probably has been - but I
> > figure its probably just easier if I ask so my question is this:
> >
> > How easy is it - or rather is it possible to create multiple instances of
> > the same db on multiple machines?
> >
> > We are currently running a very highly used postgres db (Ver 7.2) that
> > eats up a lot of cpu time when its heavily used. We recently bought some
> > very powerful equipment to accommodate this high use, (currently its on a
> > single CPU, 1GB of Ram SCSI server - upgraded to a dual CPU, 4GB of ram
> > SCSI server) but my fear is over time this issue is going to haunt me
> > again and hardware can only be upgraded so much.
>
> Well you have a very long way to go before you get to that "too much"
> stage.
>
> Within your current platform it should be possible to upgrade to 8GB of
> ram and you can almost always add more hard drives.
>
> > So is it possible to do some level of load balancing in postgres - I
> > would love a situation where I could have multiple machines running
> > multiple instances of the same db (that are all synced in real-time),
> > where there is some smart level of load balancing happening.
>
> You may want to look at pgpool, slony or Mammoth Replicator.
>
> > So if it is possible is there some instruction info out there to help me
> > along my way. Any help or insight would be greatly appreciated.

You may also want to look at upgrading to PostgreSQL 7.4.6 or 8.0 since they
both go a long way to improve performance, which might mittage your CPU bound
problem as it is now.

>
> Sincerely,
>
> Joshua D. Drake

>
> > All the best
> >
> > Adile
> >
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.801 / Virus Database: 544 - Release Date: 11/24/04

--
Darcy Buskermolen
Wavefire Technologies Corp.
ph: 250.717.0200
fx: 250.763.1759
http://www.wavefire.com