Question about pool(9) sizes

Article View: fa.netbsd.tech.kern

Article #93

Back to fa.netbsd.tech.kern Previous Next

#93

From: Brian Buhrow
Date: Fri, 03 May 2013 21:41

17 lines
2475 bytes

	Hello.  In my continuing quest to try and get i/o performance up on
some NetBSD-5.1 production boxes I have, I find I have a question about the
minimum and maximum sizes of a specific pool.
Given the following snippet of output from vmstat -m, does the size 164,
which I realize represents the number of objects in the pool, also
represent the maximum  number of objects in the pool?  That is, if more
than 164 instances of this object are needed, would the system be unable
to provide the 165th instance or can it grow the pool to accomodate the
request?  If it does grow the pool, would the size value in vmstat -m
change?
If I've got it completely wrong, could someone elaborate?

-thanks
-Brian

Name        Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
scxspl       164 67714659    0 67714659  2101  2092     9     9     1   inf 9

Technical Details

Message-ID: <fa.CvvT61+cNJakq9MTAZACNlhfF5c@ifi.uio.no>

Path:

arc1-ca.pugleaf.net!bp1ni1480pbd.1!nntp.google.com!news.glorb.com!us.feeder.erje.net!feeder.erje.net!eu.feeder.erje.net!npeer.de.kpn-eurorings.net!npeer-ng0.de.kpn-eurorings.net!uio.no!nntp.uio.no!.POSTED!not-for-mail

Show Full Headers

Complete Article Headers

X-Google-Thread: 10c6f4,5ac98966a4cb5902,start
X-Google-NewGroupId: yes
X-Google-Attributes: gidb7e13b6095,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
X-Received: by 10.68.112.65 with SMTP id io1mr4657688pbb.6.1367617315369;
        Fri, 03 May 2013 14:41:55 -0700 (PDT)
MIME-Version: 1.0
Path: arc1-ca.pugleaf.net!bp1ni1480pbd.1!nntp.google.com!news.glorb.com!us.feeder.erje.net!feeder.erje.net!eu.feeder.erje.net!npeer.de.kpn-eurorings.net!npeer-ng0.de.kpn-eurorings.net!uio.no!nntp.uio.no!.POSTED!not-for-mail
From: Brian Buhrow <buhrow@nfbcal.org>
Newsgroups: fa.netbsd.tech.kern
Subject: Question about pool(9) sizes
Date: Fri, 03 May 2013 21:41:54 UTC
Organization: Internet mailing list
Lines: 17
Sender: tech-kern-owner@NetBSD.org
Message-ID: <fa.CvvT61+cNJakq9MTAZACNlhfF5c@ifi.uio.no>
NNTP-Posting-Host: mail-jess.uio.no
X-Trace: readme.uio.no 1367617314 3192 129.240.7.9 (3 May 2013 21:41:54 GMT)
X-Complaints-To: abuse@uio.no
NNTP-Posting-Date: Fri, 3 May 2013 21:41:54 +0000 (UTC)
Cc: buhrow@nfbcal.org
To: tech-kern@netbsd.org
Delivered-To: tech-kern@netbsd.org
X-Virus-Scanned: amavisd-new at NetBSD.org
X-Virus-Status: Clean
X-Virus-Scanned: clamav-milter 0.97.3 at lothlorien.nfbcal.org
X-Mailer: Mail User's Shell (7.2.6 beta(4.pl1)+dynamic 20000103)
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.6 (lothlorien.nfbcal.org [127.0.0.1]); Fri, 03 May 2013 14:41:29 -0700 (PDT)
List-Id: tech-kern.NetBSD.org
Original-Date: Fri, 3 May 2013 14:41:29 -0700
Original-Message-Id: <201305032141.r43LfTsC027562@lothlorien.nfbcal.org>