On Sat, 1 Dec 2018, at 01:32, Дилян Палаузов wrote:
> Hello,
>
> > > 3: if your DB is larger than RAM, writing thru mmap is slower than using
> > > write() syscalls. Whenever you
> > > access a page for the first time, the OS will page it in. This is a
> > > wasted I/O if all you're doin
Hello,
> > 3: if your DB is larger than RAM, writing thru mmap is slower than using
> > write() syscalls. Whenever you
> > access a page for the first time, the OS will page it in. This is a wasted
> > I/O if all you're doing is
> > overwriting the page with new data.
>
> I doubt it... especial
On Fri, Nov 30, 2018, at 22:09, Howard Chu wrote:
> Bron Gondwana wrote:
> > Hi All,
> >
> > We were debugging the CPU usage in a ctl_conversationsdb rebuild yesterday,
> > and noticed an interesting thing. 70% of the CPU utilisation for this one
> > process
> > was inside the kernel! Mostl
Bron Gondwana wrote:
> Hi All,
>
> We were debugging the CPU usage in a ctl_conversationsdb rebuild yesterday,
> and noticed an interesting thing. 70% of the CPU utilisation for this one
> process
> was inside the kernel! Mostly with dirty pages.
>
> ctl_conversationsdb -R is particularly hea
