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BUG#51866 - crash with repair by sort and fulltext keys

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Repairing MyISAM table with fulltext indexes and low
myisam_sort_buffer_size may crash the server.

Estimation of number of index entries was done incorrectly,
causing further assertion failure or server crash.

Docs note: min value for myisam_sort_buffer_size has been
changed from 4 to 4096.
This commit is contained in:
Sergey Vojtovich
2010-03-25 16:08:21 +04:00
parent 9ecdd588c5
commit 3f641968fc
8 changed files with 70 additions and 33 deletions
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2
sql/mysqld.cc
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@ -6858,7 +6858,7 @@ The minimum value for this variable is 4096.",
"The buffer that is allocated when sorting the index when doing a REPAIR or when creating indexes with CREATE INDEX or ALTER TABLE.",
(uchar**) &global_system_variables.myisam_sort_buff_size,
(uchar**) &max_system_variables.myisam_sort_buff_size, 0,
GET_ULONG, REQUIRED_ARG, 8192*1024, 4, ~0L, 0, 1, 0},
GET_ULONG, REQUIRED_ARG, 8192 * 1024, 4096, ~0L, 0, 1, 0},
{"myisam_use_mmap", OPT_MYISAM_USE_MMAP,
"Use memory mapping for reading and writing MyISAM tables.",
(uchar**) &opt_myisam_use_mmap,