database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-26 01:22:12 +03:00
Code Activity

Track statistics for spilling of changes from ReorderBuffer.

Browse Source 
This adds the statistics about transactions spilled to disk from
ReorderBuffer. Users can query the pg_stat_replication_slots view to check
these stats and call pg_stat_reset_replication_slot to reset the stats of
a particular slot. Users can pass NULL in pg_stat_reset_replication_slot
to reset stats of all the slots.

This commit extends the statistics collector to track this information
about slots.

Author: Sawada Masahiko and Amit Kapila
Reviewed-by: Amit Kapila and Dilip Kumar
Discussion: https://postgr.es/m/CA+fd4k5_pPAYRTDrO2PbtTOe0eHQpBvuqmCr8ic39uTNmR49Eg@mail.gmail.com
This commit is contained in:
Amit Kapila
2020-10-08 09:09:08 +05:30
parent 8d2a01ae12
commit 9868167500
16 changed files with 700 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/include/replication/reorderbuffer.h
View File

@ -162,9 +162,10 @@ typedef struct ReorderBufferChange
#define RBTXN_HAS_CATALOG_CHANGES 0x0001
#define RBTXN_IS_SUBXACT 0x0002
#define RBTXN_IS_SERIALIZED 0x0004
#define RBTXN_IS_STREAMED 0x0008
#define RBTXN_HAS_TOAST_INSERT 0x0010
#define RBTXN_HAS_SPEC_INSERT 0x0020
#define RBTXN_IS_SERIALIZED_CLEAR 0x0008
#define RBTXN_IS_STREAMED 0x0010
#define RBTXN_HAS_TOAST_INSERT 0x0020
#define RBTXN_HAS_SPEC_INSERT 0x0040
/* Does the transaction have catalog changes? */
#define rbtxn_has_catalog_changes(txn) \
@ -184,6 +185,12 @@ typedef struct ReorderBufferChange
((txn)->txn_flags & RBTXN_IS_SERIALIZED) != 0 \
)
/* Has this transaction ever been spilled to disk? */
#define rbtxn_is_serialized_clear(txn) \
( \
((txn)->txn_flags & RBTXN_IS_SERIALIZED_CLEAR) != 0 \
)
/* This transaction's changes has toast insert, without main table insert. */
#define rbtxn_has_toast_insert(txn) \
( \
@ -525,6 +532,17 @@ struct ReorderBuffer
/* memory accounting */
Size size;
/*
* Statistics about transactions spilled to disk.
*
* A single transaction may be spilled repeatedly, which is why we keep
* two different counters. For spilling, the transaction counter includes
* both toplevel transactions and subtransactions.
*/
int64 spillTxns; /* number of transactions spilled to disk */
int64 spillCount; /* spill-to-disk invocation counter */
int64 spillBytes; /* amount of data spilled to disk */
};