Re: how to use trace_lock_oidmin config correctly

ok pls ignore.

i think this flag has to be used along with trace_locks = on flag.
now it works.

PostgreSQL: Documentation: 17: 19.17. Developer Options
<https://www.postgresql.org/docs/current/runtime-config-developer.html#GUC-TRACE-LOCKS>

sorry for the noise.

/*
postgres=# show trace_lock_oidmin;
LOG: LockReleaseAll: lockmethod=1
LOG: LockReleaseAll done
trace_lock_oidmin
-------------------
16406
(1 row)

postgres=# show trace_locks;
LOG: LockReleaseAll: lockmethod=1
LOG: LockReleaseAll done
trace_locks
-------------
on
(1 row)

postgres=# select 't'::regclass::oid;
LOG: LockReleaseAll: lockmethod=1
LOG: LockReleaseAll done
oid
-------
16401
(1 row)

postgres=# drop table t;
LOG: LockReleaseAll: lockmethod=1
LOG: LockReleaseAll done
DROP TABLE
*/

On Mon, 14 Oct 2024 at 16:30, Vijaykumar Jain <
vijaykumarjain(dot)github(at)gmail(dot)com> wrote:

>
>
> 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:
> PostgreSQL: Documentation: 17: 19.17. Developer Options
> <https://www.postgresql.org/docs/current/runtime-config-developer.html#GUC-TRACE-LOCK-OIDMIN>
>
> trace_lock_oidmin (integer)
>
> 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(at)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(at)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
> */
>
> --
> Thanks,
> Vijay
>
> Open to work
> Resume - Vijaykumar Jain <https://github.com/cabecada>
>

--
Thanks,
Vijay

Open to work
Resume - Vijaykumar Jain <https://github.com/cabecada>