[MDEV-31048] InnoDB read_slots and write_slots are missing PERFORMANCE_SCHEMA instrumentation Created: 2023-04-13  Updated: 2024-01-10  Resolved: 2023-04-13

Status: Closed
Project: MariaDB Server
Component/s: Performance Schema, Storage Engine - InnoDB
Affects Version/s: 10.5, 10.6, 10.7, 10.8, 10.9, 10.10, 10.11, 11.0, 11.1
Fix Version/s: 11.1.1, 10.11.3, 11.0.2, 10.6.13, 10.8.8, 10.9.6, 10.10.4

Type: Bug Priority: Major
Reporter: Marko Mäkelä Assignee: Marko Mäkelä
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-16264 Implement a common work queue for Inn... Closed
relates to MDEV-26827 Make page flushing even faster Closed

 Description   

For I/O intensive workloads, the mutexes protecting read_slots and write_slots could potentially become congestion points. This has been under the radar, because there is no PERFORMANCE_SCHEMA instrumentation for them.

Let us add wait/synch/mutex/innodb/tpool_cache_mutex for tracking them.
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