Thread: pg and chroot (performance)
Hi, I planned to let postgresql run in a chroot environment, but I wondered what could be the impact on performance... Thanks. Raph
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 > > Cheers, > > Neil > -- > Neil Conway <neilc@samurai.com> || PGP Key ID: DB3C29FC > > >
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/ > Support bacteria! They're the only culture some people have.