From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from max.phys.uu.nl (max.phys.uu.nl [131.211.32.73]) by kvack.org (8.8.7/8.8.7) with ESMTP id LAA12565 for ; Fri, 4 Dec 1998 11:51:58 -0500 Date: Fri, 4 Dec 1998 16:23:44 +0100 (CET) From: Rik van Riel Reply-To: Rik van Riel Subject: Re: SWAP: Linux far behind Solaris or I missed something (fwd) In-Reply-To: <199812041449.OAA04573@dax.scot.redhat.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: "Stephen C. Tweedie" Cc: Neil Conway , Linux MM , Jean-Michel.Vansteene@bull.net, "linux-kernel@vger.rutgers.edu" List-ID: On Fri, 4 Dec 1998, Stephen C. Tweedie wrote: > On Fri, 4 Dec 1998 10:41:15 +0000, Neil Conway > said: > > >> (although the 2.1.130+my patch seems to work very well > >> with extremely high swap throughput) > > > Since the poster didn't say otherwise, perhaps this test was performed > > with buffermem/pagecache.min_percent set to their default values, which > > IIRC add up to 13% of physical RAM (in fact that's PHYSICAL ram, not 13% > > I know. That's why relying on fixed margins to ensure good > performance is wrong: the system really ought to be self-tuning. > We may yet get it right for 2.2: there are people working on this. It appears that 2.1.130 + my little patches only needs the borrow percentage (otherwise kswapd doesn't have enough reason to switch from the always-succesful swap_out()), and that only needs to be set to a high value... (ie. /not/ the braindead values that went into 2.1.131) cheers, Rik -- the flu hits, the flu hits, the flu hits -- MORE +-------------------------------------------------------------------+ | Linux memory management tour guide. H.H.vanRiel@phys.uu.nl | | Scouting Vries cubscout leader. http://www.phys.uu.nl/~riel/ | +-------------------------------------------------------------------+ -- This is a majordomo managed list. To unsubscribe, send a message with the body 'unsubscribe linux-mm me@address' to: majordomo@kvack.org