From f05e52e36e812092434b3831457da22e7fd0b04a Mon Sep 17 00:00:00 2001 From: Amit Kapila Date: Fri, 3 Apr 2020 19:03:55 +0530 Subject: [PATCH v14 4/4] Allow verbose (auto)vacuum to display WAL usage statistics. This commit allows verbose (auto)vacuum to display WAL usage statistics added by commit <>. Author: Julien Rouhaud Reviewed-by: Fujii Masao, Dilip Kumar and Amit Kapila Discussion: https://postgr.es/m/CAB-hujrP8ZfUkvL5OYETipQwA=e3n7oqHFU=4ZLxWS_Cza3kQQ@mail.gmail.com --- src/backend/access/heap/vacuumlazy.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/src/backend/access/heap/vacuumlazy.c b/src/backend/access/heap/vacuumlazy.c index 3ca7f5d..d26094c 100644 --- a/src/backend/access/heap/vacuumlazy.c +++ b/src/backend/access/heap/vacuumlazy.c @@ -410,6 +410,8 @@ heap_vacuum_rel(Relation onerel, VacuumParams *params, int nindexes; PGRUsage ru0; TimestampTz starttime = 0; + WalUsage walusage_start = pgWalUsage; + WalUsage walusage = {0, 0, 0}; long secs; int usecs; double read_rate, @@ -614,6 +616,9 @@ heap_vacuum_rel(Relation onerel, VacuumParams *params, TimestampDifference(starttime, endtime, &secs, &usecs); + memset(&walusage, 0, sizeof(WalUsage)); + WalUsageAccumDiff(&walusage, &pgWalUsage, &walusage_start); + read_rate = 0; write_rate = 0; if ((secs > 0) || (usecs > 0)) @@ -666,7 +671,13 @@ heap_vacuum_rel(Relation onerel, VacuumParams *params, (long long) VacuumPageDirty); appendStringInfo(&buf, _("avg read rate: %.3f MB/s, avg write rate: %.3f MB/s\n"), read_rate, write_rate); - appendStringInfo(&buf, _("system usage: %s"), pg_rusage_show(&ru0)); + appendStringInfo(&buf, _("system usage: %s\n"), pg_rusage_show(&ru0)); + appendStringInfo(&buf, + _("WAL usage: %ld records, %ld full page writes, " + UINT64_FORMAT " bytes"), + walusage.wal_records, + walusage.wal_num_fpw, + walusage.wal_bytes); ereport(LOG, (errmsg_internal("%s", buf.data))); @@ -758,6 +769,8 @@ lazy_scan_heap(Relation onerel, VacuumParams *params, LVRelStats *vacrelstats, IndexBulkDeleteResult **indstats; int i; PGRUsage ru0; + WalUsage walusage_start = pgWalUsage; + WalUsage walusage = {0, 0, 0}; Buffer vmbuffer = InvalidBuffer; BlockNumber next_unskippable_block; bool skipping_blocks; @@ -1727,6 +1740,15 @@ lazy_scan_heap(Relation onerel, VacuumParams *params, LVRelStats *vacrelstats, "%u pages are entirely empty.\n", empty_pages), empty_pages); + + memset(&walusage, 0, sizeof(WalUsage)); + WalUsageAccumDiff(&walusage, &pgWalUsage, &walusage_start); + appendStringInfo(&buf, _("%ld WAL records, %ld WAL full page writes, " + UINT64_FORMAT " WAL bytes\n"), + walusage.wal_records, + walusage.wal_num_fpw, + walusage.wal_bytes); + appendStringInfo(&buf, _("%s."), pg_rusage_show(&ru0)); ereport(elevel, -- 1.8.3.1