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Applying InnoDB snashot 5.1-ss4699, part 3. Fixes BUG#43660

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1) BUG#43660 - SHOW INDEXES/ANALYZE does NOT update cardinality 
               for indexes of InnoDB table

Detailed revision comments:

r4699 | vasil | 2009-04-09 14:01:52 +0300 (Thu, 09 Apr 2009) | 15 lines
branches/5.1:

Fix Bug#43660 SHOW INDEXES/ANALYZE does NOT update cardinality for indexes
of InnoDB table

by replacing the PRNG that is used to pick random pages with a better
one.

This is based on r4670 but also adds a new configuration option and
enables the fix only if this option is changed. Please skip the present
revision when merging.

Approved by:	Heikki (via email)
This commit is contained in:
Satya B 2009-04-15 18:11:54 +05:30
commit c470d5e46e
4 changed files with 94 additions and 2 deletions
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6
storage/innobase/srv/srv0srv.c
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@ -256,6 +256,12 @@ ulint srv_read_ahead_seq = 0;
/* variable to count the number of random read-aheads */
ulint srv_read_ahead_rnd = 0;
/* An option to enable the fix for "Bug#43660 SHOW INDEXES/ANALYZE does
NOT update cardinality for indexes of InnoDB table". By default we are
running with the fix disabled because MySQL 5.1 is frozen for such
behavioral changes. */
char srv_use_legacy_cardinality_algorithm = TRUE;
/* structure to pass status variables to MySQL */
export_struc export_vars;