[lkml]   [2007]   [Jul]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: updatedb
On 7/26/07, Rene Herman <> wrote:
> On 07/25/2007 07:15 PM, Robert Deaton wrote:
> > On 7/25/07, Rene Herman <> wrote:
> >> And there we go again -- off into blabber-land. Why does swap-prefetch
> >> help updatedb? Or doesn't it? And if it doesn't, why should anyone
> >> trust anything else someone who said it does says?
> > I don't think anyone has ever argued that swap-prefetch directly helps
> > the performance of updatedb in any way
> People have argued (claimed, rather) that swap-prefetch helps their system
> after updatedb has run -- you are doing so now.
> > however, I do recall people mentioning that updatedb, being a ram
> > intensive task, will often cause things to be swapped out while it runs
> > on say a nightly cronjob.
> Problem spot no. 1.
> RAM intensive? If I run updatedb here, it never grows itself beyond 2M. Yes,
> two. I'm certainly willing to accept that me and my systems are possibly not
> the reference but assuming I'm _very_ special hasn't done much for me either
> in the past.

Might be insignificant, but updatedb calls find (~2M) and sort (~26M).
Definitely not RAM intensive though (RAM is 1GB).

> The thing updatedb does do, or at least has the potential to do, is fill
> memory with cached inodes/dentries but Linux does not swap to make room for
> caches. So why will updatedb "often cause things to be swapped out"?

[ snip ]
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-07-26 08:25    [W:0.083 / U:1.444 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site