Re: [GENERAL] Drupal and PostgreSQL - performance issues?

[Mikkel Høgh <mikkel@xxxxxxxxx>]

Alright, my benchmarks might have been a bit naïve.
When it comes to hardware, my webserver is a SunFire X2100 with an  
Opteron 1210 Dual Core and 4 GB DDR2 RAM, running 64-bit Ubuntu Linux  
Server 8.04 LTS.

When it comes to the resource usage section of my postgresql.conf, the  
only thing that are not commented out are:
shared_buffers = 24MB
max_fsm_pages = 153600

I freely admit that the reason I haven't messed with these values is  
that I have next to no clue what the different things do and how they  
affect performance, so perhaps an apology is in order. As Scott wrote,  
"Without a realistic test scenario and with no connection pooling and  
with no performance tuning, I don't think you should make any  
decisions right now about which is faster". My apologies.
--
Kind regards,

Mikkel Høgh <mikkel@xxxxxxxxx>

On 13/10/2008, at 06.54, Stephen Frost wrote:

> * Mikkel Høgh (mikkel@xxxxxxxxx) wrote:
> > I have been testing it a bit performance-wise, and the numbers are
> > worrying. In my test, MySQL (using InnoDB) had a 40% lead in
> > performance, but I'm unsure whether this is indicative for PostgreSQL
> > performance in general or perhaps a misconfiguration on my part.
>
> The comments left on your blog would probably be a good first step, if
> you're not doing them already..  Connection pooling could definitely
> help if you're not already doing it.  Drupal's MySQL-isms don't help
> things either, of course.
>
> Also, you don't post anything about the PostgreSQL config, nor the
> hardware it's running on.  The default PostgreSQL config usually isn't
> appropriate for decent hardware and that could be a contributing  
> factor
> here.  It would also be useful to make sure you've analyze'd your  
> tables
> and didn't just do a fresh load w/o any statistics having been  
> gathered.
>
> We run Drupal on PostgreSQL for an internal site and it works  
> reasonably
> well.  We havn't had any performance problems but it's not a terribly
> large site either.  The issues we've had tend to come from  
> PostgreSQL's
> somewhat less-than-supported status with Drupal.
>
> I've been meaning to look into Drupal's PG support to see about
> improving it.  Perhaps this winter I'll get a chance to.
>
> 	Thanks,
>
> 		Stephen

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