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How many times have we seen the request to “set back” or “set forward” a sequence to its original value. having a sequence, that start every time period (e.g.
On the other hand, we can use a trick to change the value of a sequence without recreating it.
Let’s say we have a sequence and its value is 1000, and we want to set it to 500.
In almost all cases, executing an Oracle ALTER SEQUENCE command can increase the cache size of sequences used by the application.
When creating sequences for a RAC environment, DBAs should use the NOORDER keyword to avoid an additional cause of SQ enqueue contention that is forced ordering of queued sequence values.
ALTER SEQUENCE seq_cache INCREMENT BY xx In RAC, sequence enqueue delays are shown in the eq_type column of the gv$enqueue_stat view.