Hi Guys, We finally found a fix. I have booted Linux with "linux numa=off". Now the linux partition is able to see all the memory allocated for it. [Numa is Non Uniform Memory Access, it's a new architecture developed to overcome the bottlenecks of SMP (Symmetric Multiprocessing), that arise when there are dozens of CPU's trying to access memory on a shared memory bus.] Since we have only 4 CPU's we donot need the numa. Thanks & Regards, -GnanaShekar- On 12/14/05, unix syzadmin <unixsyzadmin@xxxxxxxxx> wrote: > > > > Hi, > > > > The configuration of the 2 LPAR's is done such that the CPU and memory > > resources are equally divided. > > Even though the LPAR's are allocated 3.5GB RAM each, the Linux top or > > free command shows only 360MB as the available RAM. > > > > RHEL AS4 > > ======== > > [root@bangpcplin3 ~]# free -m > > total used free shared buffers > > cached > > Mem: 360 352 7 0 5 > > 74 > > -/+ buffers/cache: 271 88 > > Swap: 3074 319 2755 > > > > Have anybody else faced a similar circumstance, where the available > > memory is more than what is seen by the linux operating system? if so please > > guide me. > > > > Thanks & Regards, > > -GnanaShekar- > > > > > > On 12/14/05, Larry D Sorensen <larry.sorensen@xxxxxxxx > wrote: > > > > > > 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@xxxxxxxxx > > > > > > > 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@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@bangpcplin1 ~]# > > > > > > > > Also see a sample output of "iostat 5" > > > > > > > > [root@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@xxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxx > > > > > (610) 964-5154 > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > From: redhat-list-bounces@xxxxxxxxxx > > > > > > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of unix > > > > syzadmin > > > > > > Sent: Tuesday, December 13, 2005 8:54 PM > > > > > > To: redhat-list@xxxxxxxxxx > > > > > > 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- > > > > > > -- > > > > > > redhat-list mailing list > > > > > > unsubscribe > > > > mailto: redhat-list-request@xxxxxxxxxx?subject=subscribe > > > > > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > redhat-list mailing list > > > > > unsubscribe > > > > mailto: redhat-list-request@xxxxxxxxxx?subject=unsubscribe > > > > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > > > > -- > > > > redhat-list mailing list > > > > unsubscribe > > > > mailto: redhat-list-request@xxxxxxxxxx ?subject=unsubscribe > > > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > > > > > > > > > -- > > > redhat-list mailing list > > > unsubscribe mailto:redhat-list-request@xxxxxxxxxx ?subject=unsubscribe > > > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > > > > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list
