“enq: SQ – contention” Waits and Solution


When a sequence is queried, the NEXTVAL value is generated from the seq$ table if it is not cached. If it is cacheed, it will be retrieved from memory.

When the sequences with low cache value are queried too much, “enq: SQ – contention” will occur. To solve this problem, you can increase the cache values of the corresponding sequences.

You can change the cache value of Sequence as follows:

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