database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-25 12:03:53 +03:00
Code Activity

Avoid spurious wait in concurrent reindex

Browse Source 
This is like commit c98763bf51, but for REINDEX CONCURRENTLY.  To wit:
this flags indicates that the current process is safe to ignore for the
purposes of waiting for other snapshots, when doing CREATE INDEX
CONCURRENTLY and REINDEX CONCURRENTLY.  This helps two processes doing
either of those things not deadlock, and also avoids spurious waits.

Author: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Dmitry Dolgov <9erthalion6@gmail.com>
Reviewed-by: Hamid Akhtar <hamid.akhtar@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/20201130195439.GA24598@alvherre.pgsql
This commit is contained in:
Alvaro Herrera
2021-01-15 10:31:42 -03:00
parent 2ad78a87f0
commit f9900df5f9
2 changed files with 48 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
src/include/storage/proc.h
View File

@@ -54,6 +54,7 @@ struct XidCache
#define PROC_IS_AUTOVACUUM 0x01 /* is it an autovac worker? */
#define PROC_IN_VACUUM 0x02 /* currently running lazy vacuum */
#define PROC_IN_SAFE_IC 0x04 /* currently running CREATE INDEX
* CONCURRENTLY or REINDEX
* CONCURRENTLY on non-expressional,
* non-partial index */
#define PROC_VACUUM_FOR_WRAPAROUND 0x08 /* set by autovac only */