Dear community,
let me describe my problem:
Query:
SELECT t.value1, t.value2, x.valueA
from My300GBTable t
CROSS APPLY MyTableValuedFunction(varbinary field from table t) x
Usually, this works fine. But in some cases the plan generation takes >30 minutes. The system is showing 0% CPU, 3mb/s disk read and low memory pressure (~700GB available). IO System is 72 disk array. Disk queue length on logical disk is around 1.
dm_exec_session_wait_stats shows high PAGEIOLATCH_SH for the session.
Once the plan is ready, queries are running fast.
Any ideas how to troubleshoot that?
