Re: [PERFORM] Mapping a database completly into Memory

[Franco Bruno Borghesi]

wouldn't also increasing shared_buffers to 64 or 128 MB be a good performance improvement? This way, pages belonging to heavily used indexes would be already cached by the database itself.

Please, correct me if I'm wrong.

On Mon, 2003-07-28 at 01:14, Josh Berkus wrote:

Daniel,

> > I just wondered if there is a possibility to map my database running
> > on a linux system completly into memory and to only use disk
> > accesses for writes.
>
> That happens for free, if you have enough RAM.  The kernel will use
> spare RAM to hold copies of every disk block it's ever read.

Also, don't forget to raise your effective_cache_size so that PostgreSQL 
*knows* that you have lots of RAM.

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