Could be Bug 4142932 (see Note 4142932.8) : DBA_SEGMENTS.EXTENTS wrong for locally managed segment after TRUNCATE operation
They have also shown a test case in the note : This problem is introduced in 18.104.22.168 by the fix for bug 3338673.
The value returned from DBA_SEGMENTS.EXTENTS can be wrong for a segment in a locally managed tablespace after a TRUNCATE operation on that segment.
eg: CREATE TABLE A ( A NUMBER ); /* In a LOCALLY MANAGED TABLESPACE */ ALTER TABLE a allocate extent; ALTER TABLE a allocate extent; ALTER TABLE a allocate extent; TRUNCATE TABLE a; SELECT * FROM DBA_SEGMENTS WHERE SEGMENT_NAME='A'; ^ Shows an EXTENTS value of 4 rather than 1 (as truncated to)
When I query dba_segments I get:
owner segment_name partition_name segment_type tablespace_name header_file header_block bytes blocks extents initial_extent next_extent min_extents max_extents pct_increase freelists freelist_groups relative_fno buffer_pool
REPADMIN T_INSTRU_LDGR T_INSTRU_LDGR_200504 TABLE PARTITION TS_LDGR_M2 71 1289 2212495360 270080 211 10485760 10485760 1 2147483645 0 1 1 71 DEFAULT
Yet, when I map the tablespace, there are no extents. We have done a truncate of the partition with a drop storage, and it shows storage.
What's up with this?
Database is 22.214.171.124 HP-UX.
Michael Kline Database Administration SunTrust Banks, Inc. Mail Code TOC-7505 1030 Wilmer Avenue Richmond, Va. 23227 Tel: 804.261.9446 Net: 643.9446 Cell: 804.744.1545 <mailto:michael.kline@xxxxxxxxxxxx>michael.kline@xxxxxxxxxxxx
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