Date: Tue, 18 Apr 2000 08:52:45 -0300 From: "Elias Alexandre Argenton" <elias@pro.via-rs.com.br> To: <questions@FreeBSD.org> Subject: very low speed FreeBSD Message-ID: <003a01bfa92c$a67f9ee0$21051cac@elias.procergs>
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Hi everybody. Someone could help us?
We have a dual Pentium III 500MHZ with 256MB RAM and 2x18GB SCSI disks tied
with vinum. This machine runs postfix-19991231 with radius authentication
for about 40.000 mailboxes over FreeBSD 3.4.
The top command reports 90% of the time the CPU is above 95% idle (see
below).
Despite this, it takes about 10 seconds to show the first screen of a vi
command.
Another strange symptom is the report from iostat (see below). It shows a
great discrepancy among our disks, mainly in the msps measure. It also shows
a great discrepancy (very high numbers) about what should be the msps of any
SCSI disk.
This configuration is running for months and we have no report of hardware
or software failure or malfunction whatsoever.
Could the numbers from iostat be wrong?
Could the numbers from top be wrong?
What else could be wrong?
What can we do?
Thanks.
------------- Elias A. Argenton ----------
this is a sample of the output from "iostat -t da -w 5 -do"
da0 da1
sps tps msps sps tps msps
490 41 24.7 107 6 179
559 51 19.6 94 5 218
513 37 27.2 154 6 179
166 18 56.3 26 1 1253
291 28 36.3 32 2 418
158 12 80.8 10 1 1670
156 13 74.8 29 0 2505
313 25 40.7 28 0 2505
101 10 98.2 0 0 0.0
160 15 65.1 13 1 1253
304 23 43.2 94 4 250
118 10 104 3 0 5010
47 6 179 0 0 0.0
202 17 59.6 185 2 501
169 12 83.5 0 0 0.0
111 7 152 0 0 0.0
464 22 45.1 0 0 0.0
330 26 39.1 54 2 455
su-2.03# top
last pid: 37869; load averages: 0.14, 0.15, 0.15 up 26+12:31:19
23:56:18
132 processes: 1 running, 124 sleeping, 7 stopped
CPU states: 0.6% user, 0.0% nice, 2.3% system, 0.8% interrupt, 96.4%
idle
Mem: 55M Active, 151M Inact, 33M Wired, 9016K Cache, 8345K Buf, 1196K Free
Swap: 512M Total, 77M Used, 434M Free, 15% Inuse
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
37809 root 28 0 1752K 956K CPU1 0 0:03 2.45% 2.29% top
161 root 2 0 936K 512K select 1 34:15 0.00% 0.00% inetd
72145 root 2 0 6880K 5672K select 0 238:17 0.00% 0.00% named
72250 root 2 0 964K 356K select 1 20:39 0.00% 0.00%
radiusd.esva
79386 root 2 0 908K 540K select 1 11:20 0.00% 0.00% master
1 root 10 0 496K 72K wait 0 9:02 0.00% 0.00% init
364 root 2 0 836K 248K accept 1 8:13 0.00% 0.00% viarsd
5375 postfix 2 0 1504K 1188K select 1 6:05 0.00% 0.00%
trivial-rewr
38 root 10 0 513M 1212K mfsidl 1 4:06 0.00% 0.00% mount_mfs
18304 root 2 0 1752K 1388K select 1 3:07 0.00% 0.00% top
19541 postfix 2 0 1892K 1620K select 1 0:45 0.00% 0.00% qmgr
164 root 10 0 1008K 376K nanslp 0 0:33 0.00% 0.00% cron
29111 tty 2 0 768K 420K sbwait 1 0:04 0.00% 0.00% comsat
37058 rsf8427 2 0 2672K 2388K sbwait 1 0:02 0.00% 0.00% popper
17709 root 2 0 888K 544K select 1 0:02 0.00% 0.00% telnetd
73741 root 10 0 924K 528K STOP 1 0:02 0.00% 0.00% iostat
92530 root 2 0 888K 556K select 1 0:02 0.00% 0.00% telnetd
26182 root 2 0 884K 216K accept 1 0:01 0.00% 0.00%
aliasemaild
73065 root 2 0 888K 544K select 1 0:01 0.00% 0.00% telnetd
39315 root 2 0 780K 228K accept 1 0:01 0.00% 0.00% onlined
su-2.03#
su-2.03# df
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/da0s1a 496111 76643 379780 17% /
/dev/da0s1f 5954477 3539275 1938844 65% /usr
/dev/da0s1e 127023 11489 105373 10% /var
procfs 4 4 0 100% /proc
/dev/vinum/bigvol 27651329 11210856 14228367 44% /bigvol
mfs:38 507771 603 466547 0% /usr/local/etc/raddb
su-2.03#
su-2.03# /usr/sbin/pkg_info
autoconf-2.13 Automatically configure source code on many Un*x
platforms
bash-2.03 The GNU Borne Again Shell
gdbm-1.8.0 The GNU database manager
gmake-3.78.1 GNU version of 'make' utility
imap-uw-4.5 University of Washington IMAP4rev1/POP2/POP3 mail
servers
libtool-1.3.3 Generic shared library support script
linux_base-5.2 The base set of packages needed in Linux mode
m4-1.4 GNU's m4
mpack-1.5 External MIME packer/unpacker
postfix-19991231 Good alternative to sendmail
qpopper-2.53 Berkeley POP 3 server (now maintained by Qualcomm)
rpm-2.5.6 The Red Hat Package Manager
su-2.03#
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