diff options
| author | Amit Kapila | 2024-09-04 03:25:21 +0000 |
|---|---|---|
| committer | Amit Kapila | 2024-09-04 03:25:21 +0000 |
| commit | 6c2b5edecc0d6c936e27775c9451d32bb3141c90 (patch) | |
| tree | a3717ebb364195cceaac32754aec901072531f98 /src/include/replication | |
| parent | 9626068f13338f79ba183b4cf3c975e22c98c575 (diff) | |
Collect statistics about conflicts in logical replication.
This commit adds columns in view pg_stat_subscription_stats to show the
number of times a particular conflict type has occurred during the
application of logical replication changes. The following columns are
added:
confl_insert_exists:
Number of times a row insertion violated a NOT DEFERRABLE unique
constraint.
confl_update_origin_differs:
Number of times an update was performed on a row that was
previously modified by another origin.
confl_update_exists:
Number of times that the updated value of a row violates a
NOT DEFERRABLE unique constraint.
confl_update_missing:
Number of times that the tuple to be updated is missing.
confl_delete_origin_differs:
Number of times a delete was performed on a row that was
previously modified by another origin.
confl_delete_missing:
Number of times that the tuple to be deleted is missing.
The update_origin_differs and delete_origin_differs conflicts can be
detected only when track_commit_timestamp is enabled.
Author: Hou Zhijie
Reviewed-by: Shveta Malik, Peter Smith, Anit Kapila
Discussion: https://postgr.es/m/OS0PR01MB57160A07BD575773045FC214948F2@OS0PR01MB5716.jpnprd01.prod.outlook.com
Diffstat (limited to 'src/include/replication')
| -rw-r--r-- | src/include/replication/conflict.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/replication/conflict.h b/src/include/replication/conflict.h index ca797fb41c6..c759677ff54 100644 --- a/src/include/replication/conflict.h +++ b/src/include/replication/conflict.h @@ -14,6 +14,12 @@ /* * Conflict types that could occur while applying remote changes. + * + * This enum is used in statistics collection (see + * PgStat_StatSubEntry::conflict_count and + * PgStat_BackendSubEntry::conflict_count) as well, therefore, when adding new + * values or reordering existing ones, ensure to review and potentially adjust + * the corresponding statistics collection codes. */ typedef enum { @@ -42,6 +48,8 @@ typedef enum */ } ConflictType; +#define CONFLICT_NUM_TYPES (CT_DELETE_MISSING + 1) + extern bool GetTupleTransactionInfo(TupleTableSlot *localslot, TransactionId *xmin, RepOriginId *localorigin, |