database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +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

29
src/backend/replication/logical/logical.c
View File

@ -32,6 +32,7 @@
#include "access/xlog_internal.h"
#include "fmgr.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "replication/decode.h"
#include "replication/logical.h"
#include "replication/origin.h"
@ -1460,3 +1461,31 @@ ResetLogicalStreamingState(void)
CheckXidAlive = InvalidTransactionId;
bsysscan = false;
}
/*
* Report stats for a slot.
*/
void
UpdateDecodingStats(LogicalDecodingContext *ctx)
{
ReorderBuffer *rb = ctx->reorder;
/*
* Nothing to do if we haven't spilled anything since the last time the
* stats has been sent.
*/
if (rb->spillBytes <= 0)
return;
elog(DEBUG2, "UpdateSpillStats: updating stats %p %lld %lld %lld",
rb,
(long long) rb->spillTxns,
(long long) rb->spillCount,
(long long) rb->spillBytes);
pgstat_report_replslot(NameStr(ctx->slot->data.name),
rb->spillTxns, rb->spillCount, rb->spillBytes);
rb->spillTxns = 0;
rb->spillCount = 0;
rb->spillBytes = 0;
}