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Show shared object statistics in pg_stat_database

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This adds a row to the pg_stat_database view with datoid 0 and datname
NULL for those objects that are not in a database. This was added
particularly for checksums, but we were already tracking more satistics
for these objects, just not returning it.

Also add a checksum_last_failure column that holds the timestamptz of
the last checksum failure that occurred in a database (or in a
non-dataabase file), if any.

Author: Julien Rouhaud <rjuju123@gmail.com>
This commit is contained in:
Magnus Hagander
2019-04-12 14:04:50 +02:00
parent ef6f30fe77
commit 77bd49adba
10 changed files with 76 additions and 17 deletions
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2
src/include/pgstat.h
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@ -541,6 +541,7 @@ typedef struct PgStat_MsgChecksumFailure
PgStat_MsgHdr m_hdr;
Oid m_databaseid;
int m_failurecount;
TimestampTz m_failure_time;
} PgStat_MsgChecksumFailure;
@ -607,6 +608,7 @@ typedef struct PgStat_StatDBEntry
PgStat_Counter n_temp_bytes;
PgStat_Counter n_deadlocks;
PgStat_Counter n_checksum_failures;
TimestampTz last_checksum_failure;
PgStat_Counter n_block_read_time; /* times in microseconds */
PgStat_Counter n_block_write_time;