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Track statistics for spilling of changes from ReorderBuffer.

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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
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9
src/backend/replication/logical/decode.c
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@ -650,6 +650,12 @@ DecodeCommit(LogicalDecodingContext *ctx, XLogRecordBuffer *buf,
/* replay actions of all transaction + subtransactions in order */
ReorderBufferCommit(ctx->reorder, xid, buf->origptr, buf->endptr,
commit_time, origin_id, origin_lsn);
/*
* Update the decoding stats at transaction commit/abort. It is not clear
* that sending more or less frequently than this would be better.
*/
UpdateDecodingStats(ctx);
}
/*
@ -669,6 +675,9 @@ DecodeAbort(LogicalDecodingContext *ctx, XLogRecordBuffer *buf,
}
ReorderBufferAbort(ctx->reorder, xid, buf->record->EndRecPtr);
/* update the decoding stats */
UpdateDecodingStats(ctx);
}
/*