-
Notifications
You must be signed in to change notification settings - Fork 1.7k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
MDEV-20699 mysqldump of routines causes MariaDB to get killed by oom-…
…killer The reason for this behavior is that SP get cached, per connection. The stored_program_cache is size of this cache, which amounts to 256 routines by default. A compiled stored procedure can easily be several megabytes in size. Thus calling SHOW CREATE PROCEDURE for all stored procedures, like mysqldump does, can require significant amount of memory. Fixed by bypassing the cache for "SHOW CREATE". This should normally be fine also perfomance-wise, as cache is meant to be used for repeated execution, not repeated SHOW CREATEs. Added a test to verify that CREATE PROCEDURE + SHOW CREATE PROCEURE do not cache, i.e amount of allocated memory does not change. Note, there is a change in existing behavior in an edge case : If "SHOW CREATE PROCEDURE p1" called from p1, after p1 was altered, now this will now return altered code. Previour behavior - relied on caching and would return old code. The previous behavior might was not necessarily correct.
- Loading branch information
Showing
6 changed files
with
49 additions
and
21 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters