Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end)

[Andrea Arcangeli]

On Fri, Mar 05, 2004 at 03:34:25PM +0100, Ingo Molnar wrote:
> 
> * Andrea Arcangeli <andrea@xxxxxxx> wrote:
> 
> > > vsyscall-sys_gettimeofday and vsyscall-sys_time could help quite some
>                                   ^^^^^^^^^^^^^^^^^
> > > for mysql. Also, the highly threaded nature of mysql on the same MM
> > 
> > he said he doesn't use gettimeofday frequently, so most of the flushes
> > are from other syscalls.
> 
> you are not reading Pete's and my emails too carefully, are you? Pete
> said:

I thought time() wouldn't be called more than 1 per second anyways, why
would anyone call time more than 1 per second?

> 
> > [...] MySQL does not use gettimeofday very frequently now, actually it
> > uses time() most of the time, as some platforms used to have huge
>   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > performance problems with gettimeofday() in the past.
> >
> > The amount of gettimeofday() use will increase dramatically in the
> > future so it is good to know about this matter.
> 
> 	Ingo
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