As of recent, we get There is insufficient system memory in resource pool 'default' to run this query.Normally, this happens during backups, DBCC checks, or memory intensive (e.g. ranking) procedures. The main DB is about 500GB in size. This is what led up to this point:
- For about 1 year we ran Microsoft SQL Server 2012, 64 bit, 64GB. Maximum Memory capped at 53GB. Data on SSDs, logs/tempdb on "regular" drives. No memory errors.
- Then, we upgraded "regular" drives to SSDs and put logs/tempdb on them. Started getting seldom insufficient memory errors
- Updated the server to Service Pack 1 - 11.0.3373.0 (X64) -- Cumulative Update 5. Now, getting these errors a couple of times a week.
The error log showing messages logged around one of these "events" is here: ErrorLog
Your help on how these memory issues can be addressed would be greatly appreciated.