Alvar Penning ea3d8e6b07 notifications: Close Prepared Statement ... The prepared statement used to fetch custom vars from SQL for notification events is not closed. This results in leaking prepared statements, eventually resulting in the rejection of new prepared statements. > notifications: Cannot build event from history entry error="cannot > build event for \"[...]\",\"[...]\": Error 1461 (42000): Can't create > more than max_prepared_stmt_count statements (current value: 16382)" Monitoring MariaDB's prepared_stmt_count over roughly ten minutes before and after this change shows an increasing number of open prepared statements. Before patch 180 +-----------------------------------------------------------------+ | + + + + + + AAAA | 160 |-+ AAA +-| | AA | 140 |-+ AAAAA +-| | AAAA | 120 |-+ AAA +-| | AAAAA | 100 |-+ AAAAAAA +-| 80 |-+ AAAA +-| | AA | 60 |-+ AAA +-| | AAAAAAAA | 40 |-+ AAAA +-| | AAAAA | 20 |-+ AAA +-| | +AAA + + + + + + | 0 +-----------------------------------------------------------------+ 9 1.76579 1.76579x 1.76579 1.76579 1.76579 1.76579x 1.76579 1.765 1.76579x10 Unix timestamp The second graph, a record after the patch, contains measurements at the zero level. After patch 1 +-----------------------------------------------------------------+ | + + + + + + + | | | 0.8 |-+ +-| | | | | | | 0.6 |-+ +-| | | | | 0.4 |-+ +-| | | | | | | 0.2 |-+ +-| | | | + + + + + + + | 0 +-----------------------------------------------------------------+ 9 1.76579 1.76579x 1.76579 1.76579 1.76579 1.76579x 1.76579 1.765 1.76579x10 Unix timestamp		2025-12-15 11:23:44 +01:00
..
fetch.go	notifications: Close Prepared Statement	2025-12-15 11:23:44 +01:00
notifications.go	notifications: Mute and Unmute Events	2025-11-17 09:20:07 +01:00
sorter.go	notifications: Speed up StreamSorter Tests	2025-11-17 09:20:07 +01:00
sorter_test.go	notifications: Speed up StreamSorter Tests	2025-11-17 09:20:07 +01:00