PGCon2011 - Add 4 Video (2015.09.18)
PGCon 2011
The PostgreSQL Conference
| Speakers | |
|---|---|
|
Jignesh K. Shah |
| Schedule | |
|---|---|
| Day | Talks - 1 - 2011-05-19 |
| Room | DMS 1140 |
| Start time | 15:00 |
| Duration | 01:00 |
| Info | |
| ID | 287 |
| Event type | Lecture |
| Track | Hacking |
| Language used for presentation | English |
Understanding PostgreSQL LWLocks
In this session we take a look at the Light Weight Lock facility in PostgreSQL and the various lwlocks.
PostgreSQL uses Light Weight Locks to manage PostgreSQL Locks. In this session we take
Describe the framework of PostgreSQL LWLocks facility -> Architecture of the LWLocks Framework -> Lifecycle of an LWLock using its API -> Understanding Exclusive and Shared modes of lwlock -> Internals of LWLock Wait List -> Ways to monitors the events related to LWLocks
Top LWLocks. -> WALInsertLock -> WALWriteLock -> ProcArrayLock -> SInvalReadLock -> CLogControlLock -> DynamicLWLocks
Once you start monitoring LWLocks, you will probably find one of the above locks as highly used or contended. We go a bit further in understanding what this lock means and the corrective actions to take to reduce the stress on the locks.