On Friday 03 January 2003 01:16 pm, you wrote: > You still may get better performance with LVM because the I/O architecture > only allows one (1) I/O to a given device address at a time. If you stripe, > then you actually have multiple device addresses assigned to a single file > system, so you can have multiple I/O (one per device address) active to the > filesystem at a time.
A couple of other things that should be investigated is the obvious need to tune semaphores and shared memory - Oracle writes base-line parameters for this. Some less than obvious parameters are related to the IP stack - check vmstat/iostat/sar and tools of that variety for possible Linux bottlenecks as the session counts increase and you'll likely find that some relatively simple pokes into the /proc filesystems will go a long way toward saving cycles and increasing OS performance. Oh yeah, don't forget to increase the max number of processes and locks for the Oracle accounts. Sorry to ramble but tuning for Oracle is a big subject. Steve
