I wanted to dump all heap WAL records with pg_waldump, so I did this:
$ pg_waldump --rmgr=heap --rmgr=heap2 data/pg_wal/000000010000000000000001
--stat=record
Type N (%) Record size
(%) FPI size (%) Combined size (%)
---- - --- -----------
--- -------- --- ------------- ---
Heap2/PRUNE 268 ( 8.74) 18192
( 2.73) 0 ( 0.00) 18192 ( 1.74)
Heap2/VACUUM 55 ( 1.79) 4940
( 0.74) 0 ( 0.00) 4940 ( 0.47)
Heap2/FREEZE_PAGE 277 ( 9.03) 186868
( 28.03) 0 ( 0.00) 186868 ( 17.86)
Heap2/VISIBLE 467 ( 15.23) 27783
( 4.17) 376832 ( 99.34) 404615 ( 38.68)
Heap2/MULTI_INSERT 1944 ( 63.38) 354800
( 53.21) 2520 ( 0.66) 357320 ( 34.16)
Heap2/MULTI_INSERT+INIT 56 ( 1.83) 74152
( 11.12) 0 ( 0.00) 74152 ( 7.09)
-------- --------
-------- --------
Total 3067 666735
[63.74%] 379352 [36.26%] 1046087 [100%]
pg_waldump: fatal: error in WAL record at 0/1680118: invalid record length at
0/1680150: wanted 24, got 0
That didn't do what I wanted. It only printed the Heap2 records, not
Heap, even though I specified both. The reason is that if you specify
multiple --rmgr options, only the last one takes effect.
I propose the attached to allow selecting multiple rmgrs, by giving
multiple --rmgr options. With that, it works the way I expected:
$ pg_waldump --rmgr=heap --rmgr=heap2 data/pg_wal/000000010000000000000001
--stat=record
Type N (%) Record size
(%) FPI size (%) Combined size (%)
---- - --- -----------
--- -------- --- ------------- ---
Heap2/PRUNE 268 ( 1.77) 18192
( 0.71) 0 ( 0.00) 18192 ( 0.55)
Heap2/VACUUM 55 ( 0.36) 4940
( 0.19) 0 ( 0.00) 4940 ( 0.15)
Heap2/FREEZE_PAGE 277 ( 1.83) 186868
( 7.33) 0 ( 0.00) 186868 ( 5.67)
Heap2/VISIBLE 467 ( 3.09) 27783
( 1.09) 376832 ( 50.37) 404615 ( 12.27)
Heap2/MULTI_INSERT 1944 ( 12.86) 354800
( 13.91) 2520 ( 0.34) 357320 ( 10.83)
Heap2/MULTI_INSERT+INIT 56 ( 0.37) 74152
( 2.91) 0 ( 0.00) 74152 ( 2.25)
Heap/INSERT 9948 ( 65.80) 1433891
( 56.22) 8612 ( 1.15) 1442503 ( 43.73)
Heap/DELETE 942 ( 6.23) 50868
( 1.99) 0 ( 0.00) 50868 ( 1.54)
Heap/UPDATE 193 ( 1.28) 101265
( 3.97) 9556 ( 1.28) 110821 ( 3.36)
Heap/HOT_UPDATE 349 ( 2.31) 36910
( 1.45) 1300 ( 0.17) 38210 ( 1.16)
Heap/LOCK 209 ( 1.38) 11481
( 0.45) 316828 ( 42.35) 328309 ( 9.95)
Heap/INPLACE 212 ( 1.40) 44279
( 1.74) 32444 ( 4.34) 76723 ( 2.33)
Heap/INSERT+INIT 184 ( 1.22) 188803
( 7.40) 0 ( 0.00) 188803 ( 5.72)
Heap/UPDATE+INIT 15 ( 0.10) 16273
( 0.64) 0 ( 0.00) 16273 ( 0.49)
-------- --------
-------- --------
Total 15119 2550505
[77.32%] 748092 [22.68%] 3298597 [100%]
pg_waldump: fatal: error in WAL record at 0/1680150: invalid record length at
0/16801C8: wanted 24, got 0
- Heikki
>From 991296f690d79a12670f1dca341ecffccf78f907 Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas <heikki.linnakan...@iki.fi>
Date: Tue, 18 May 2021 16:46:53 +0300
Subject: [PATCH 1/1] Allow specifying pg_waldump --rmgr option multiple times.
Before, if you specified multiple --rmgr options, only the last one took
effect. It seems more sensible to select all the specfied resource
managers.
---
doc/src/sgml/ref/pg_waldump.sgml | 3 ++-
src/bin/pg_waldump/pg_waldump.c | 16 ++++++++++------
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/doc/src/sgml/ref/pg_waldump.sgml b/doc/src/sgml/ref/pg_waldump.sgml
index 5fcdfe210ac..432254d2d5d 100644
--- a/doc/src/sgml/ref/pg_waldump.sgml
+++ b/doc/src/sgml/ref/pg_waldump.sgml
@@ -142,7 +142,8 @@ PostgreSQL documentation
<term><option>--rmgr=<replaceable>rmgr</replaceable></option></term>
<listitem>
<para>
- Only display records generated by the specified resource manager.
+ Only display records generated by the specified resource manager. You can
+ specify the option multiple times to select multiple resource managers.
If <literal>list</literal> is passed as name, print a list of valid resource manager
names, and exit.
</para>
diff --git a/src/bin/pg_waldump/pg_waldump.c b/src/bin/pg_waldump/pg_waldump.c
index f8b8afe4a7b..5c6aa0df03e 100644
--- a/src/bin/pg_waldump/pg_waldump.c
+++ b/src/bin/pg_waldump/pg_waldump.c
@@ -49,7 +49,8 @@ typedef struct XLogDumpConfig
bool stats_per_record;
/* filter options */
- int filter_by_rmgr;
+ bool filter_by_rmgr[RM_MAX_ID + 1];
+ bool filter_by_rmgr_enabled;
TransactionId filter_by_xid;
bool filter_by_xid_enabled;
} XLogDumpConfig;
@@ -814,7 +815,8 @@ main(int argc, char **argv)
config.stop_after_records = -1;
config.already_displayed_records = 0;
config.follow = false;
- config.filter_by_rmgr = -1;
+ /* filter_by_rmgr array was zeroed by memset above */
+ config.filter_by_rmgr_enabled = false;
config.filter_by_xid = InvalidTransactionId;
config.filter_by_xid_enabled = false;
config.stats = false;
@@ -869,16 +871,17 @@ main(int argc, char **argv)
exit(EXIT_SUCCESS);
}
+ config.filter_by_rmgr_enabled = true;
for (i = 0; i <= RM_MAX_ID; i++)
{
if (pg_strcasecmp(optarg, RmgrDescTable[i].rm_name) == 0)
{
- config.filter_by_rmgr = i;
+ config.filter_by_rmgr[i] = true;
break;
}
}
- if (config.filter_by_rmgr == -1)
+ if (i > RM_MAX_ID)
{
pg_log_error("resource manager \"%s\" does not exist",
optarg);
@@ -1087,8 +1090,9 @@ main(int argc, char **argv)
}
/* apply all specified filters */
- if (config.filter_by_rmgr != -1 &&
- config.filter_by_rmgr != record->xl_rmid)
+ if (config.filter_by_rmgr_enabled &&
+ (record->xl_rmid < 0 || record->xl_rmid > RM_MAX_ID ||
+ !config.filter_by_rmgr[record->xl_rmid]))
continue;
if (config.filter_by_xid_enabled &&
--
2.30.2
