lkml.org 
[lkml]   [2005]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [rfc] lockless pagecache
Benjamin LaHaise wrote:
> On Mon, Jun 27, 2005 at 06:02:15PM +1000, Nick Piggin wrote:
>
>>However I think for Oracle and others that use shared memory like
>>this, they are probably not doing linear access, so that would be a
>>net loss. I'm not completely sure (I don't have access to real loads
>>at the moment), but I would have thought those guys would have looked
>>into fault ahead if it were a possibility.
>
>
> Shared memory overhead doesn't show up on any of the database benchmarks
> I've seen, as they tend to use huge pages that are locked in memory, and
> thus don't tend to access the page cache at all after ramp up.
>

To be quite honest I don't have any real workloads here that stress
it, however I was told that it is a problem for oracle database. If
there is anyone else who has problems then I'd be interested to hear
them as well.

--
SUSE Labs, Novell Inc.

Send instant messages to your online friends http://au.messenger.yahoo.com

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-06-28 02:37    [W:0.214 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site