pg and chroot (performance)

On Tue, 2003-02-18 at 12:07, Raphael Bauduin wrote:

I planned to let postgresql run in a chroot environment, but I wondered
what could be the impact on performance...

Why would you expect chroot to have any significant effect on
performance? AFAICS that shouldn't be the case, but I haven't tested it
myself...

Cheers,

Neil
--
Neil Conway <neilc@samurai.com> || PGP Key ID: DB3C29FC

On Tue, Feb 18, 2003 at 09:55:48PM -0500, Neil Conway wrote:

On Tue, 2003-02-18 at 12:07, Raphael Bauduin wrote:

I planned to let postgresql run in a chroot environment, but I wondered
what could be the impact on performance...

Why would you expect chroot to have any significant effect on
performance? AFAICS that shouldn't be the case, but I haven't tested it
myself...

I read somewhere that all disk access is first checked to be acceptable
due to the chroot.

Raph

On Wed, Feb 26, 2003 at 10:58:33AM +0100, Raphael Bauduin wrote:

On Tue, Feb 18, 2003 at 09:55:48PM -0500, Neil Conway wrote:

On Tue, 2003-02-18 at 12:07, Raphael Bauduin wrote:

I planned to let postgresql run in a chroot environment, but I wondered
what could be the impact on performance...

Why would you expect chroot to have any significant effect on
performance? AFAICS that shouldn't be the case, but I haven't tested it
myself...

I read somewhere that all disk access is first checked to be acceptable
due to the chroot.

That would be a silly way do it. chroot just changes the root directory,
nothing more. It only gets looked at when you use a / at the beginning of a
filename or use .. to go to the parent directory.

Normally you're just chrooted to the real /, so there is no performance
difference compared to chrooting elsewhere.

--
Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/