Stephane wrote:
Hi everyone,
somebody can help me??????? my boss want to migrate to ORACLE................
#fsync = true
[snip]
Are you using battery baked RAID?
Your problem is probably due to the database syncing all the time. With fsync one, you get 1 sync per transaction that
updates,deletes, etc. 4 million writes/day = 46 writes/sec avg. Of course, writes will be very bursty, and when you
getover 100 you are going to have problems even on 15k system. All databases have this problem, including Oracle.
KeepingWAL and data on separate volumes helps a lot. It's quicker and easier to use hardware solution tho.
If you want to run fsync on with that much I/O, consider using a battery backed raid controller that caches writes.
Thiswill make a *big* difference. A quick'n'dirty test is to turn fsync off for a little while to see if this fixes
yourperformance problems.
Merlin
