Re: Size of Swap with large phy. mem
From: Casper H.S. Dik - Network Security Engineer <Casper.Dik_at_Holland.Sun.Com>
Date: 31 Jan 2001 11:08:10 GMT
Message-ID: <958rmq$3ks$1_at_new-usenet.uk.sun.com>
Date: 31 Jan 2001 11:08:10 GMT
Message-ID: <958rmq$3ks$1_at_new-usenet.uk.sun.com>
[[ PLEASE DON'T SEND ME EMAIL COPIES OF POSTINGS ]] spam_at_fil.ion.ucl.ac.uk ('ric davis) writes:
>Casper H.S. Dik - Network Security Engineer <Casper.Dik_at_Holland.Sun.Com>
>wrote:
>> (except when you run S2.6 or earlier where shmem
>> use counts double towards swap)
>Does this mean that going from 2.6 to 7 or 8 could reduce swap useage
>with a lot of shared memory apps?
If those applications use "intimate shared memory"; (I.e., SHARE_MMU shared memory), such as Oracle databases, then yes.
(I think the bug in 2.6 and earlier causes the memory to be locked down, which takes away memory from swap, and reserved as swap space, so you pay twice)
Casper
-- Expressed in this posting are my opinions. They are in no way related to opinions held by my employer, Sun Microsystems. Statements on Sun products included here are not gospel and may be fiction rather than truth.Received on Wed Jan 31 2001 - 12:08:10 CET