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BUG#11757032 - 49030: OPTIMIZE TABLE BREAKS MYISAM TABLE WHEN

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USING MYISAM_USE_MMAP ON WINDOWS

When OPTIMIZE/REPAIR TABLE is switching to new data file,
old data file is removed while memory mapping is still
active.

With 5.1 implementation of nt_share_delete() it is not
permitted to remove mmaped file.

This fix disables memory mapping for mi_repair() operations.

mysql-test/r/myisam.result:
  A test case for BUG#11757032.
mysql-test/t/myisam.test:
  A test case for BUG#11757032.
storage/myisam/ha_myisam.cc:
  mi_repair*() functions family use file I/O even if memory
  mapping is available.
  
  Since mixing mmap I/O and file I/O may cause various artifacts,
  memory mapping must be disabled.
storage/myisam/mi_delete_all.c:
  Clean-up: do not attempt to remap file after truncate, since
  there is nothing to map.
This commit is contained in:
Sergey Vojtovich
2011-10-20 15:03:22 +04:00
parent fd955448c8
commit de8c70e70b
4 changed files with 58 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
mysql-test/r/myisam.result
View File

@ -2412,4 +2412,28 @@ CARDINALITY
DROP TABLE t1;
SET myisam_sort_buffer_size=@@global.myisam_sort_buffer_size;
SET myisam_repair_threads=@@global.myisam_repair_threads;
#
# BUG#11757032 - 49030: OPTIMIZE TABLE BREAKS MYISAM TABLE WHEN
# USING MYISAM_USE_MMAP ON WINDOWS
#
SET GLOBAL myisam_use_mmap=1;
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(2);
DELETE FROM t1 WHERE a=1;
FLUSH TABLE t1;
LOCK TABLE t1 WRITE;
OPTIMIZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
INSERT INTO t1 VALUES(3);
UNLOCK TABLES;
SELECT * FROM t1;
a
2
3
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
DROP TABLE t1;
SET GLOBAL myisam_use_mmap=default;
End of 5.1 tests

18
mysql-test/t/myisam.test
View File

@ -1645,4 +1645,22 @@ DROP TABLE t1;
SET myisam_sort_buffer_size=@@global.myisam_sort_buffer_size;
SET myisam_repair_threads=@@global.myisam_repair_threads;
--echo #
--echo # BUG#11757032 - 49030: OPTIMIZE TABLE BREAKS MYISAM TABLE WHEN
--echo # USING MYISAM_USE_MMAP ON WINDOWS
--echo #
SET GLOBAL myisam_use_mmap=1;
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(2);
DELETE FROM t1 WHERE a=1;
FLUSH TABLE t1;
LOCK TABLE t1 WRITE;
OPTIMIZE TABLE t1;
INSERT INTO t1 VALUES(3);
UNLOCK TABLES;
SELECT * FROM t1;
CHECK TABLE t1;
DROP TABLE t1;
SET GLOBAL myisam_use_mmap=default;
--echo End of 5.1 tests