linux server slow.
Larry D Sorensen
larry.sorensen at juno.com
Wed Dec 14 04:12:54 UTC 2005
It looks like your problem may be with the Virtual IO partition rather
than with your Linux partition. I would start there and look back over
your configurations for that. IBM has some good documentation on LPARs
and VIO on their web site.
On Wed, 14 Dec 2005 09:27:32 +0530 unix syzadmin <unixsyzadmin at gmail.com>
writes:
> Hi,
>
> We have setup 2 LPARs (Logical Partitions) on IBM p5-550.
> One for AIX 5.3, The 2nd one for the RHEL AS4.
> The server has 4 CPU's and 8GB RAM. It has two 140GB hard disk.
> The 2 LPAR's are configured with a virtual ethernet client and
> virtual
> SCSI client.
>
> We have created 2 volume groups and each volume group containing 2
> logical
> volumes. We have assiged 2 logical volumes to each virtual host.
>
> The CPU and memory is divided as follows
> VIO partition -->.5 (5 Virtual processors), 512MB RAM
> AIX partition --> 1.7 (17 Virtual processors), 3.5GB RAM
> RedHat AS4 partition -->1.7 (17 Virtual processors), 3.5GB RAM
>
> Just see a sample of output of ping to another server in the network
> from
> RHEL AS4.
>
> [root at bangpcplin1 ~]# ping bangpcplin3
> PING bangpcplin3.bea.com (172.22.43.47) 56(84) bytes of data.
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=0 ttl=64
> time=
> 21.8 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=1 ttl=64
> time=
> 9.05 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=2 ttl=64
> time=
> 8.97 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=3 ttl=64
> time=
> 10.0 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=4 ttl=64
> time=
> 13.0 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=5 ttl=64
> time=
> 11.0 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=6 ttl=64
> time=
> 8.98 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=7 ttl=64
> time=
> 6.60 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=8 ttl=64
> time=
> 10.9 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=9 ttl=64
> time=
> 9.98 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=10 ttl=64
> time=
> 10.0 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=11 ttl=64
> time=
> 7.92 ms
> 64 bytes from bangpcplin3.bea.com (172.22.43.47): icmp_seq=12 ttl=64
> time=
> 9.98 ms
>
> --- bangpcplin3.bea.com ping statistics ---
> 13 packets transmitted, 13 received, 0% packet loss, time 12088ms
> rtt min/avg/max/mdev = 6.605/10.650/21.824/3.557 ms, pipe 2
> [root at bangpcplin1 ~]#
>
> Also see a sample output of "iostat 5"
>
> [root at bangpcplin1 ~]# iostat 5
> Linux 2.6.9-5.EL (bangpcplin1) 12/14/2005
>
> avg-cpu: %user %nice %sys %iowait %idle
> 0.82 0.00 0.43 1.13 97.62
>
> Device: tps Blk_read/s Blk_wrtn/s Blk_read
> Blk_wrtn
> sda 10.61 140.42 63.16 142819579
> 64242894
> sdb 1.83 35.94 25.10 36551596
> 25528376
>
> avg-cpu: %user %nice %sys %iowait %idle
> 0.03 0.00 2.69 3.08 94.20
>
> Device: tps Blk_read/s Blk_wrtn/s Blk_read
> Blk_wrtn
> sda 102.19 1011.95 309.16 5080
> 1552
> sdb 36.25 290.04 0.00 1456
> 0
>
> avg-cpu: %user %nice %sys %iowait %idle
> 0.12 0.00 2.78 4.01 93.09
>
> Device: tps Blk_read/s Blk_wrtn/s Blk_read
> Blk_wrtn
> sda 92.79 1463.73 1.60 7304
> 8
> sdb 29.86 235.67 4.81 1176
> 24
>
> avg-cpu: %user %nice %sys %iowait %idle
> 0.02 0.00 2.60 3.88 93.50
>
> Device: tps Blk_read/s Blk_wrtn/s Blk_read
> Blk_wrtn
> sda 128.80 2056.00 0.00 10280
> 0
> sdb 0.40 0.00 4.80 0
> 24
>
> avg-cpu: %user %nice %sys %iowait %idle
> 0.04 0.00 2.79 3.35 93.83
>
> Device: tps Blk_read/s Blk_wrtn/s Blk_read
> Blk_wrtn
> sda 162.28 1534.53 621.16 7688
> 3112
> sdb 0.00 0.00 0.00 0
> 0
>
>
> Thanks & Regards,
>
> -GnanaShekar-
>
>
>
> On 12/14/05, Smith, Albert <Albert.Smith at genexservices.com> wrote:
> >
> > Without knowing more about the configuration of your system and of
> the
> > application there is very little go on. Can you provide more
> details?
> >
> > Albert Smith
> > Sr. Unix Systems Administrator
> > HPCSA, RHCT
> > Genex Services
> > 440 E. Swedesford Rd.
> > Wayne, PA 19087
> > albert.smith at genexservices.com
> > (610) 964-5154
> >
> >
> >
> > > -----Original Message-----
> > > From: redhat-list-bounces at redhat.com
> > > [mailto:redhat-list-bounces at redhat.com] On Behalf Of unix
> syzadmin
> > > Sent: Tuesday, December 13, 2005 8:54 PM
> > > To: redhat-list at redhat.com
> > > Subject: linux server slow.
> > >
> > > Hi,
> > >
> > > The users in my team are running tests for weblogic on linux
> > > (RHEL AS4). We generally run test for weblogic on different
> > > operating system and certify it.
> > > They have complained that the linux server is slow. A test
> > > that usually would take 30 mins is taking about 5 hours.
> > > They have not faced this kind of slowness with any other
> > > server (solaris, aix & hp-unix), even the earlier servers
> > > that were running linux.
> > >
> > > I am new to troubleshooting performance problems. Please
> suggest.
> > >
> > > Thanks & Regards,
> > > -GnanaShekar-
> > > --
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> > >
> >
> >
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