Re: TSearch2 memory usage

On Mon, 21 May 2007, Hannes Dorbath wrote:

> We have a fixed amount of 16 PG backend processes. Once created they stay
> forever. OLTP load is distributed over them in a SQF fashion.
>
> As loading a TSearch dictionary takes a few moments, we have a script that
> connects to each backend on start up and pushes the dictionary into ram by
> simply calling ts_debug('foo');
>
> The dictionary has a file size of 9.8MB.
>
> If we don't call the script `free' prints:
>
> total used free shared buffers cached
> Mem: 4048056 953192 3094864 0 4 359300
> -/+ buffers/cache: 593888 3454168
>
> After the script has called ts_debug('foo') on each backend:
>
> total used free shared buffers cached
> Mem: 4048056 2374508 1673548 0 4 370340
> -/+ buffers/cache: 2004164 2043892
>
>
> Is it supposed to blast so much memory?

dictionary is just a program ! Are you usin custom dictionaries ?

what does 'select * from ts_debug('foo');' prints ?

>
> This is PG 8.2.4 on x86_64.
>
>
>

Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg(at)sai(dot)msu(dot)su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83