HI, my linux server (redhat 5.6) which is in clustered and sap application is running there but for two day we are facing extremely slow while trying to access the server.there is some os level log, i've attached here for your information.

looking forward for your valuable suggestion.

regards
mihir


Call Trace:
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8006ec4e>] do_gettimeofday+0x40/0x90
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8005a78d>] getnstimeofday+0x10/0x28
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff800637ca>] io_schedule+0x3f/0x67
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff800f7445>] __blockdev_direct_IO+0x8da/0xa82
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff880509b6>] :ext3:ext3_direct_IO+0x141/0x1cf
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8804ecfb>] :ext3:ext3_get_block+0x0/0xf7
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8000c603>] __generic_file_aio_read+0xb8/0x198
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff80008d56>] __handle_mm_fault+0x5f3/0x1039
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff80016e0c>] generic_file_aio_read+0x34/0x39
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8000cee6>] do_sync_read+0xc7/0x104
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8009c987>] getrusage+0x299/0x2b6
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff800a28b4>] autoremove_wake_function+0x0/0x2e
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff80062ff0>] thread_return+0x62/0xfe
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8000b787>] vfs_read+0xcb/0x171
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff80013627>] sys_pread64+0x50/0x70
Aug 25 08:13:03 SPLECCPRDN2 kernel: [<ffffffff8005d116>] system_call+0x7e/0x83
Aug 25 08:13:03 SPLECCPRDN2 kernel:
Aug 25 08:13:32 SPLECCPRDN2 kernel: qla2xxx 0000:15:00.1: scsi(2:0:4): Abort command issued -- 1 79125ae 2002.

We've suggested you contact Red Hat support several times...why don't you? Again, as with the other issues you faced, they can analyze the trace for you, and suggest fixes. Also, the version of RHEL you're using is old...has it been updated/patched through the Red Hat network, since you're paying for it?

Just saying you have a sap application tells us nothing, nor do the vague messages you posted here. It looks like it's related to your HBA, but again, you post no details about your SAN, where you got the driver, etc. AGAIN, we will suggest you contact Red Hat support, and perhaps your SAN vendor, and your SAP application vendor too. You are PAYING for support, aren't you??

"qla2xxx Abort command issued" is not an error. It is a status message indicating that the driver aborted a command at the kernels request (some upper level service) ~or~ in response to a fabric or end storage device status received. check with your storage