We have a server ABC that is a monitored server that is experiencing slowness when doing queries via SQL. Yesterday, the system seemed to lock up and was inaccessible. The system was still running but could not be logged into, so it was rebooted. Since that time it has been running fine but as I had said it seems to be slow.
Do we need to verify configuration settings?
ABC Server does not appear to be utilizing the available resources though, I am showing and average of 22% memory usage and 5% to 6% CPU usage over a 30 day period, and the daily stats look very much the same. This ABC server itself has 128 GB or RAM but is only utilizing 31GB, which seems very suspect to me for an SQL Server.
Yesterday, I was receiving instances of queries being caught in a SUSPENDED status, which purportedly means it is waiting on I/O. The wait types that I was receiving were CXPACKET, RESOURCE_SEMAPHORE, and PAGEIOLATCH_SH. The best possible reason I could come up with from my Google research is poor disk health, slow disk speed, memory pressure, poorly configured MAXDOP, or high consumption operations on large tables (like pol and acc txn tables, which we were hitting pretty hard yesterday with testing new Geico reporting which uses Tips data instead of Warehouse).
It does not appear to be related to specific reports or queries and appears to just be resource bottlenecks as far as I can tell.
Any recommendations/advice on how to resolve this Slowness of server?
Thanks.