Explanation of index statistics
- From: Binyamin Dissen <bdissen@xxxxxxxxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 14 May 2004 13:50:14 +0300
I did an analyze against the index that is using so many buffers (when there
was less than 10 rows in the table).
analyze index &indexname validate structure
The INDEX_STATS table shows
HEIGHT BLOCKS NAME PARTITION_NAME 3
16384 &indexname
LF_ROWS LF_BLKS LF_ROWS_LEN LF_BLK_LEN BR_ROWS BR_BLKS BR_ROWS_LEN
106536 6465 2450320 3540 6464 157 122626
BR_BLK_LEN DEL_LF_ROWS DEL_LF_ROWS_LEN DISTINCT_KEYS MOST_REPEATED_KEY
3932 106533 2450251 30847 18
BTREE_SPACE USED_SPACE PCT_USED ROWS_PER_KEY BLKS_GETS_PER_ACCESS PRE_ROWS
23503424 2572946 11 3.4536908 5.2268454 0
PRE_ROWS_LEN OPT_CMPR_COUNT OPT_CMPR_PCTSAVE
0 2 28
How do these numbers match to such a small table (at the time of the analyze)?
--
Binyamin Dissen <bdissen@xxxxxxxxxxxxxxxxxx>
http://www.dissensoftware.com
Director, Dissen Software, Bar & Grill - Israel
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