Sometimes engine may "hang" using 100% CPU load and no IO activity for the few minutes [CORE1731] #2155
Submitted by: @hvlad
I have test case sent to me privately by one user. It is too big to attach it here (rar is more than 9MB).
Problem is related with precedence graph walk algorithm. Sometimes walk of this graph, performed by function CCH\writable, takes huge amount of time.
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