Last updated on DECEMBER 06, 2016
Applies to:
Oracle Database - Enterprise Edition - Version 11.1.0.7 to 11.2.0.1.0 [Release 11.1 to 11.2]Information in this document applies to any platform.
***Checked for relevance on 17-Jul-2016***
Symptoms
Taking a long period of time when adding a datafile to tablespace.
System state dump shows enq: TT - contention which is blocking users from accessing the tablespace.
Dumping one waiter:
inst: 1, sid: 530, ser: 3095
wait event: 'enq: TT - contention'
p1: 'name|mode'=0x54540004
p2: 'tablespace ID'=0x7
p3: 'operation'=0x10
row_wait_obj#: 14275, block#: 0, row#: 0, file# 0
min_blocked_time: 8 secs, waiter_cache_ver: 64804
Cause
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