Have an issue that keeps popping up from time to time that I am hoping someone else has seen and knows the cause and how to fix. We are on 2009, and run MP in a batch overnight (7 helpers, item distribution of 10). Normally the process takes less than 10 minutes to execute, but we keep having periods where it will start taking longer to run, and I mean longer exponentially. When looking at the log, the time increase is in the item coverage phase. Here is what we have seen the happen recently - I will start earllier in the month to show the normal times:
7/6 - 00:01:25
7/7 - 00:01:27
7/8 - 00:01:26
7/9 - 00:01:27
7/10 - 00:01:30
7/11 - 00:01:26
7/12 - 00:30:01
7/13 - 01:17:49
7/14 - 02:07:09
7/15 - 02:11:13
7/16 - 02:14:06
7/17 - 02:57:00
7/18 - 03:39:28
There were no deadlocks or retries the last 2 runs. A few of the others had 1 or 2. Number of levels has stayed consistent at 4. Total items has been consistent - roughly 94,000. No parameter changes have been made regarding coverage groups or parameters for master plan. Nothing is showing up in the long running queries in SQL trace inquiry.
This is the 3rd or 4th time we have had the issue crop up, and it has somehow managed to correct itself before becoming too much trouble, but as the time creeps up it runs in to the regular processing day, causing deadlocks, etc.
Thanks.