Long story short.
7 year old physical server with sql 2000.
2 weeks ago went mad slow. No code changes. We have a data rep product from db2 that stopped working due to lock timeouts. I fixed this out of hours with no users on (100000000 records refreshed) and it now runs fine. We had data on the physical disk andnlogs on iscsi san.added a ssd san for the data files and migrated them across.
All working ok but terrible.performance remains. Users getting slow access app perf or timing out. Overnight job that took 2 hours takes 30 etc.
Using profiler found missing stats but no improvement. Index tuner nothing.execution plans are ok. Slow server side and client side.
Perfmon sql counters have disappeared since did the disk swap.so.not able to use.
Most users are connecting via access apps on one terminal server.
Getting hammered on this. Any advice?