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revive innodb_debug_sync

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innodb_debug_sync was introduced in commit
b393e2cb0c and reverted in
commit fc58c17216 due to memory leak reported
by valgrind, see MDEV-21336.

The leak is now fixed by adding `rw_lock_free(&slot->debug_sync_lock)`
after background thread working loop is finished, and the patch is
reapplied, with respect to c++98 fixes by Marko.

The missing DEBUG_SYNC for MDEV-18546 in row0vers.cc is also reapplied.
This commit is contained in:
Nikita Malyavin
2019-07-25 22:17:04 +10:00
parent a35cde8cd8
commit 300253acf1
8 changed files with 205 additions and 0 deletions
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12
mysql-test/suite/sys_vars/r/sysvars_innodb.result
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@ -654,6 +654,18 @@ NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME INNODB_DEBUG_SYNC
SESSION_VALUE NULL
DEFAULT_VALUE
VARIABLE_SCOPE GLOBAL
VARIABLE_TYPE VARCHAR
VARIABLE_COMMENT debug_sync for innodb purge threads. Use it to set up sync points for all purge threads at once. The commands will be applied sequentially at the beginning of purging the next undo record.
NUMERIC_MIN_VALUE NULL
NUMERIC_MAX_VALUE NULL
NUMERIC_BLOCK_SIZE NULL
ENUM_VALUE_LIST NULL
READ_ONLY NO
COMMAND_LINE_ARGUMENT NONE
VARIABLE_NAME INNODB_DEFAULT_ENCRYPTION_KEY_ID
SESSION_VALUE 1
DEFAULT_VALUE 1