I do not see logs for locks linked to attaching and detaching partitions if I use the
trace_lock_oidmin config set to oid below the table of concern, basically any locking on objects above the threshold oid do not log.
from the doc:
If set, do not trace locks for tables below this OID (used to avoid output on system tables).
This parameter is only available if the LOCK_DEBUG macro was defined when PostgreSQL was compiled
i compiled my postgres with LOCK_DEBUG macro
/*
postgres@ubuntu:/tmp$ pg_config
BINDIR = /opt/postgresql/bin
DOCDIR = /opt/postgresql/share/doc
HTMLDIR = /opt/postgresql/share/doc
INCLUDEDIR = /opt/postgresql/include
PKGINCLUDEDIR = /opt/postgresql/include
INCLUDEDIR-SERVER = /opt/postgresql/include/server
LIBDIR = /opt/postgresql/lib
PKGLIBDIR = /opt/postgresql/lib
LOCALEDIR = /opt/postgresql/share/locale
MANDIR = /opt/postgresql/share/man
SHAREDIR = /opt/postgresql/share
SYSCONFDIR = /opt/postgresql/etc
PGXS = /opt/postgresql/lib/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--prefix=/opt/postgresql' '--with-openssl' '--enable-debug' '--enable-profiling' '--enable-cassert' '--enable-tap-tests' 'CFLAGS=-ggdb -Og -g3 -fno-omit-frame-pointer -DLOCK_DEBUG -DBTREE_BUILD_STATS -DWAL_DEBUG '
CC = gcc
CPPFLAGS = -D_GNU_SOURCE
CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wimplicit-fallthrough=3 -Wcast-function-type -Wshadow=compatible-local -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-format-truncation -Wno-stringop-truncation -g -pg -DLINUX_PROFILE -ggdb -Og -g3 -fno-omit-frame-pointer -DLOCK_DEBUG -DBTREE_BUILD_STATS -DWAL_DEBUG
CFLAGS_SL = -fPIC
LDFLAGS = -Wl,--as-needed -Wl,-rpath,'/opt/postgresql/lib',--enable-new-dtags
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgcommon -lpgport -lssl -lcrypto -lz -lreadline -lm
VERSION = PostgreSQL 18devel
postgres@ubuntu:/tmp$ psql
psql (18devel)
Type "help" for help.
postgres=# show client_min_messages;
client_min_messages
---------------------
log
(1 row)
postgres=# show trace_lock_oidmin;
trace_lock_oidmin
-------------------
16400
(1 row)
postgres=# select 't'::regclass::oid;
oid
-------
16401
(1 row)
postgres=# select 't1'::regclass::oid;
oid
-------
16404
(1 row)
postgres=# alter table t detach partition t1;
ALTER TABLE
postgres=# alter table t attach partition t1 for values in (0);
ALTER TABLE
*/
but if i map the trace_lock_table to the oid of one table, it logs locking fine.
/*
postgres=# alter system set trace_lock_table = 16401;
ALTER SYSTEM
postgres=# select pg_reload_conf();
pg_reload_conf
----------------
t
(1 row)
postgres=# alter table t detach partition t1;
LOG: LockAcquire: lock [5,16401] AccessExclusiveLock
LOG: LockAcquire: new: lock(0x708b6d12ae78) id(5,16401,0,0,0,1) grantMask(0) req(0,0,0,0,0,0,0)=0 grant(0,0,0,0,0,0,0)=0 wait(0) type(AccessExclusiveLock)
LOG: LockAcquire: new: proclock(0x708b6d1da680) lock(0x708b6d12ae78) method(1) proc(0x708b6d4b8250) hold(0)
LOG: LockCheckConflicts: no conflict: proclock(0x708b6d1da680) lock(0x708b6d12ae78) method(1) proc(0x708b6d4b8250) hold(0)
LOG: GrantLock: lock(0x708b6d12ae78) id(5,16401,0,0,0,1) grantMask(100) req(0,0,0,0,0,0,0)=1 grant(0,0,0,0,0,0,0)=1 wait(0) type(AccessExclusiveLock)
LOG: LockAcquire: lock [5,16401] AccessExclusiveLock
LOG: LockReleaseAll: proclock(0x708b6d1da680) lock(0x708b6d12ae78) method(1) proc(0x708b6d4b8250) hold(100)
LOG: LockReleaseAll: lock(0x708b6d12ae78) id(5,16401,0,0,0,1) grantMask(100) req(0,0,0,0,0,0,0)=1 grant(0,0,0,0,0,0,0)=1 wait(0) type(INVALID)
LOG: UnGrantLock: updated: lock(0x708b6d12ae78) id(5,16401,0,0,0,1) grantMask(0) req(0,0,0,0,0,0,0)=0 grant(0,0,0,0,0,0,0)=0 wait(0) type(AccessExclusiveLock)
LOG: UnGrantLock: updated: proclock(0x708b6d1da680) lock(0x708b6d12ae78) method(1) proc(0x708b6d4b8250) hold(0)
LOG: LockReleaseAll: updated: lock(0x708b6d12ae78) id(5,16401,0,0,0,1) grantMask(0) req(0,0,0,0,0,0,0)=0 grant(0,0,0,0,0,0,0)=0 wait(0) type(INVALID)
LOG: CleanUpLock: deleting: proclock(0x708b6d1da680) lock(0x708b6d12ae78) method(1) proc(0x708b6d4b8250) hold(0)
LOG: CleanUpLock: deleting: lock(0x708b6d12ae78) id(5,16401,0,0,0,1) grantMask(0) req(0,0,0,0,0,0,0)=0 grant(0,0,0,0,0,0,0)=0 wait(0) type(INVALID)
ALTER TABLE
*/
