Wait on TT-ENQUEUE when Adding a Datafile

(Doc ID 1101758.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.1 to 11.2]
Information in this document applies to any platform.
***Checked for relevance on 17-Jul-2016***


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


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms