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Track total number of WAL records, FPIs and bytes generated in the cluster.

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Commit 6b466bf5f2 allowed pg_stat_statements to track the number of
WAL records, full page images and bytes that each statement generated.
Similarly this commit allows us to track the cluster-wide WAL statistics
counters.

New columns wal_records, wal_fpi and wal_bytes are added into the
pg_stat_wal view, and reports the total number of WAL records,
full page images and bytes generated in the , respectively.

Author: Masahiro Ikeda
Reviewed-by: Amit Kapila, Movead Li, Kyotaro Horiguchi, Fujii Masao
Discussion: https://postgr.es/m/35ef960128b90bfae3b3fdf60a3a860f@oss.nttdata.com
This commit is contained in:
Fujii Masao
2020-12-02 13:00:15 +09:00
parent 91624c2ff8
commit 01469241b2
7 changed files with 104 additions and 9 deletions
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6
src/include/pgstat.h
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@ -459,6 +459,9 @@ typedef struct PgStat_MsgBgWriter
typedef struct PgStat_MsgWal
{
PgStat_MsgHdr m_hdr;
PgStat_Counter m_wal_records;
PgStat_Counter m_wal_fpi;
uint64 m_wal_bytes;
PgStat_Counter m_wal_buffers_full;
} PgStat_MsgWal;
@ -798,6 +801,9 @@ typedef struct PgStat_GlobalStats
*/
typedef struct PgStat_WalStats
{
PgStat_Counter wal_records;
PgStat_Counter wal_fpi;
uint64 wal_bytes;
PgStat_Counter wal_buffers_full;
TimestampTz stat_reset_timestamp;
} PgStat_WalStats;