NetNews Usenet Archive 1993 #1/NN_1993_1.iso/spool/comp/unix/ultrix/9171

Internet Message Format | 1993-01-05 | 1.4 KB

Path: sparky!uunet!munnari.oz.au!metro!grivel!alsvid.une.edu.au!mark
From: [e-mail] (Mark Garrett Internet: [e-mail] Phone: [phone])
Newsgroups: comp.unix.ultrix
Subject: Re: Some buffer cache questions
Message-ID: <[e-mail]>
Date: 5 Jan 93 11:46:36 GMT
References: <[e-mail]>
Organization: University of New England - Northern Rivers (Lismore)
Lines: 21

From article <[e-mail]>, by [e-mail] (Roger Taranto):
> In article <[e-mail]> [e-mail] (Alan Rollow - Alan's Home for Wayward Tumbleweeds.) writes:
>>[...]  I've regularly run 128 MB systems with 25%
>>buffer caches and those have worked fine.  You do have to watch how
>>you use delay_wbuffers with a large cache.
>
> So, what am I supposed to be watching the delay_wbuffers for?

    Long delays can result form having to write large buffer caches.
Setting delay_wbuffers causes buffer writes to be delayed until update cause
a flush of the buffer cache, so if the last period was mostly writes and
a near full buffer cache and that cache is large then expect the system to pause
every time update runs after a lot of disk writes have happened.

    Can be anoying.

        Cheers
            Mark :)
--
Mark Garrett    Internet:  [e-mail]    Phone:     [phone]
   University of New England, Northern Rivers, Lismore NSW Australia.