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Rename assorted LWLock tranches.
Choose names that fit into the conventions for wait event names (particularly, that multi-word names are in the style MultiWordName) and hopefully convey more information to non-hacker users than the previous names did. Also rename SerializablePredicateLockListLock to SerializablePredicateListLock; the old name was long enough to cause table formatting problems, plus the double occurrence of "Lock" seems confusing/error-prone. Also change a couple of particularly opaque LWLock field names. Discussion: https://postgr.es/m/28683.1589405363@sss.pgh.pa.us
This commit is contained in:
Tom Lane
@ -1751,29 +1751,22 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
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<tbody>
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<row>
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<entry><literal>AddinShmemInitLock</literal></entry>
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<entry>Waiting to manage space allocation in shared memory.</entry>
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</row>
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<row>
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<entry><literal>NotifySLRULock</literal></entry>
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<entry>Waiting to access the <command>NOTIFY</command> message SLRU
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cache.</entry>
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</row>
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<row>
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<entry><literal>NotifyQueueLock</literal></entry>
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<entry>Waiting to read or update <command>NOTIFY</command> messages.</entry>
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<entry>Waiting to manage an extension's space allocation in shared
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memory.</entry>
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</row>
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<row>
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<entry><literal>AutoFileLock</literal></entry>
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<entry>Waiting to update the <filename>postgresql.auto.conf</filename> file.</entry>
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<entry>Waiting to update the <filename>postgresql.auto.conf</filename>
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file.</entry>
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</row>
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<row>
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<entry><literal>AutovacuumLock</literal></entry>
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<entry>Autovacuum worker or launcher waiting to update or
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read the current state of autovacuum workers.</entry>
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<entry>Waiting to read or update the current state of autovacuum
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workers.</entry>
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</row>
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<row>
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<entry><literal>AutovacuumScheduleLock</literal></entry>
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<entry>Waiting to ensure that the table selected for a vacuum
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<entry>Waiting to ensure that a table selected for autovacuum
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still needs vacuuming.</entry>
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</row>
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<row>
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@ -1786,52 +1779,80 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
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B-tree index.</entry>
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</row>
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<row>
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<entry><literal>XactSLRULock</literal></entry>
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<entry>Waiting to access the transaction status SLRU cache.</entry>
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<entry><literal>BufferContent</literal></entry>
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<entry>Waiting to access a data page in memory.</entry>
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</row>
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<row>
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<entry><literal>XactTruncationLock</literal></entry>
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<entry>Waiting to execute <function>pg_xact_status</function> or update
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the oldest transaction ID available to it.</entry>
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<entry><literal>BufferIO</literal></entry>
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<entry>Waiting for I/O on a data page.</entry>
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</row>
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<row>
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<entry><literal>BufferMapping</literal></entry>
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<entry>Waiting to associate a data block with a buffer in the buffer
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pool.</entry>
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</row>
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<row>
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<entry><literal>CheckpointLock</literal></entry>
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<entry>Waiting to perform checkpoint.</entry>
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<entry>Waiting to begin a checkpoint.</entry>
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</row>
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<row>
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<entry><literal>CheckpointerCommLock</literal></entry>
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<entry>Waiting to manage fsync requests.</entry>
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</row>
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<row>
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<entry><literal>CommitTsLock</literal></entry>
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<entry>Waiting to read or update the last value set for a
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transaction commit timestamp.</entry>
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</row>
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<row>
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<entry><literal>CommitTsBuffer</literal></entry>
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<entry>Waiting for I/O on a commit timestamp SLRU buffer.</entry>
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</row>
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<row>
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<entry><literal>CommitTsSLRULock</literal></entry>
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<entry>Waiting to access the commit timestamp SLRU cache.</entry>
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</row>
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<row>
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<entry><literal>CommitTsLock</literal></entry>
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<entry>Waiting to read or update the last value set for the
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transaction timestamp.</entry>
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</row>
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<row>
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<entry><literal>ControlFileLock</literal></entry>
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<entry>Waiting to read or update the control file or creation of a
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new WAL file.</entry>
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<entry>Waiting to read or update the <filename>pg_control</filename>
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file or create a new WAL file.</entry>
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</row>
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<row>
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<entry><literal>DynamicSharedMemoryControlLock</literal></entry>
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<entry>Waiting to read or update dynamic shared memory state.</entry>
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<entry>Waiting to read or update dynamic shared memory allocation
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information.</entry>
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</row>
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<row>
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<entry><literal>LockFastPath</literal></entry>
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<entry>Waiting to read or update a process' fast-path lock
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information.</entry>
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</row>
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<row>
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<entry><literal>LockManager</literal></entry>
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<entry>Waiting to read or update information
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about <quote>heavyweight</quote> locks.</entry>
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</row>
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<row>
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<entry><literal>LogicalRepWorkerLock</literal></entry>
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<entry>Waiting for action on logical replication worker to finish.</entry>
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<entry>Waiting to read or update the state of logical replication
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workers.</entry>
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</row>
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<row>
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<entry><literal>MultiXactGenLock</literal></entry>
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<entry>Waiting to read or update shared multixact state.</entry>
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</row>
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<row>
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<entry><literal>MultiXactMemberBuffer</literal></entry>
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<entry>Waiting for I/O on a multixact member SLRU buffer.</entry>
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</row>
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<row>
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<entry><literal>MultiXactMemberSLRULock</literal></entry>
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<entry>Waiting to access the multixact member SLRU cache.</entry>
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</row>
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<row>
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<entry><literal>MultiXactOffsetBuffer</literal></entry>
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<entry>Waiting for I/O on a multixact offset SLRU buffer.</entry>
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</row>
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<row>
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<entry><literal>MultiXactOffsetSLRULock</literal></entry>
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<entry>Waiting to access the multixact offset SLRU cache.</entry>
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@ -1841,35 +1862,90 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
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<entry>Waiting to read or truncate multixact information.</entry>
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</row>
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<row>
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<entry><literal>OidGenLock</literal></entry>
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<entry>Waiting to allocate or assign an OID.</entry>
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<entry><literal>NotifyBuffer</literal></entry>
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<entry>Waiting for I/O on a <command>NOTIFY</command> message SLRU
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buffer.</entry>
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</row>
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<row>
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<entry><literal>SerialSLRULock</literal></entry>
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<entry>Waiting to access the serializable transaction conflict SLRU
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<entry><literal>NotifyQueueLock</literal></entry>
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<entry>Waiting to read or update <command>NOTIFY</command> messages.</entry>
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</row>
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<row>
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<entry><literal>NotifySLRULock</literal></entry>
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<entry>Waiting to access the <command>NOTIFY</command> message SLRU
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cache.</entry>
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</row>
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<row>
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<entry><literal>OidGenLock</literal></entry>
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<entry>Waiting to allocate a new OID.</entry>
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</row>
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<row>
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<entry><literal>OldSnapshotTimeMapLock</literal></entry>
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<entry>Waiting to read or update old snapshot control information.</entry>
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</row>
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<row>
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<entry><literal>ProcArrayLock</literal></entry>
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<entry>Waiting to get a snapshot or clearing a transaction id at
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transaction end.</entry>
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<entry><literal>ParallelAppend</literal></entry>
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<entry>Waiting to choose the next subplan during Parallel Append plan
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execution.</entry>
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</row>
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<row>
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<entry><literal>RelCacheInitLock</literal></entry>
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<entry>Waiting to read or write relation cache initialization file.</entry>
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<entry><literal>ParallelHashJoin</literal></entry>
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<entry>Waiting to synchronize workers during Parallel Hash Join plan
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execution.</entry>
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</row>
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<row>
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<entry><literal>ParallelQueryDSA</literal></entry>
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<entry>Waiting for parallel query dynamic shared memory allocation.</entry>
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</row>
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<row>
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<entry><literal>PerSessionDSA</literal></entry>
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<entry>Waiting for parallel query dynamic shared memory allocation.</entry>
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</row>
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<row>
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<entry><literal>PerSessionRecordType</literal></entry>
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<entry>Waiting to access a parallel query's information about composite
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types.</entry>
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</row>
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<row>
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<entry><literal>PerSessionRecordTypmod</literal></entry>
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<entry>Waiting to access a parallel query's information about type
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modifiers that identify anonymous record types.</entry>
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</row>
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<row>
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<entry><literal>PerXactPredicateList</literal></entry>
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<entry>Waiting to access the list of predicate locks held by the current
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serializable transaction during a parallel query.</entry>
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</row>
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<row>
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<entry><literal>PredicateLockManager</literal></entry>
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<entry>Waiting to access predicate lock information used by
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serializable transactions.</entry>
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</row>
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<row>
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<entry><literal>ProcArrayLock</literal></entry>
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<entry>Waiting to access the shared per-process data structures
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(typically, to get a snapshot or report a session's transaction
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ID).</entry>
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</row>
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<row>
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<entry><literal>RelationMappingLock</literal></entry>
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<entry>Waiting to update the relation map file used to store catalog
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to filenode mapping.</entry>
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<entry>Waiting to read or update
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a <filename>pg_filenode.map</filename> file (used to track the
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filenode assignments of certain system catalogs).</entry>
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</row>
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<row>
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<entry><literal>RelCacheInitLock</literal></entry>
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<entry>Waiting to read or update a <filename>pg_internal.init</filename>
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relation cache initialization file.</entry>
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</row>
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<row>
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<entry><literal>ReplicationOriginLock</literal></entry>
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<entry>Waiting to setup, drop or use replication origin.</entry>
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<entry>Waiting to create, drop or use a replication origin.</entry>
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</row>
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<row>
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<entry><literal>ReplicationOriginState</literal></entry>
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<entry>Waiting to read or update the progress of one replication
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origin.</entry>
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</row>
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<row>
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<entry><literal>ReplicationSlotAllocationLock</literal></entry>
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@ -1880,13 +1956,13 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
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<entry>Waiting to read or update replication slot state.</entry>
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</row>
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<row>
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<entry><literal>SInvalReadLock</literal></entry>
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<entry>Waiting to retrieve or remove messages from shared invalidation
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queue.</entry>
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<entry><literal>ReplicationSlotIO</literal></entry>
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<entry>Waiting for I/O on a replication slot.</entry>
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</row>
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<row>
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<entry><literal>SInvalWriteLock</literal></entry>
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<entry>Waiting to add a message in shared invalidation queue.</entry>
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<entry><literal>SerialBuffer</literal></entry>
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<entry>Waiting for I/O on a serializable transaction conflict SLRU
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buffer.</entry>
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</row>
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<row>
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<entry><literal>SerializableFinishedListLock</literal></entry>
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@ -1894,36 +1970,65 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
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transactions.</entry>
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</row>
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<row>
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<entry><literal>SerializablePredicateLockListLock</literal></entry>
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<entry>Waiting to perform an operation on a list of locks held by
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<entry><literal>SerializablePredicateListLock</literal></entry>
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<entry>Waiting to access the list of predicate locks held by
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serializable transactions.</entry>
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</row>
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<row>
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||||
<entry><literal>SerializableXactHashLock</literal></entry>
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<entry>Waiting to retrieve or store information about serializable
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<entry>Waiting to read or update information about serializable
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||||
transactions.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SerialSLRULock</literal></entry>
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||||
<entry>Waiting to access the serializable transaction conflict SLRU
|
||||
cache.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SharedTidBitmap</literal></entry>
|
||||
<entry>Waiting to access a shared TID bitmap during a parallel bitmap
|
||||
index scan.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SharedTupleStore</literal></entry>
|
||||
<entry>Waiting to access a shared tuple store during parallel
|
||||
query.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>ShmemIndexLock</literal></entry>
|
||||
<entry>Waiting to find or allocate space in shared memory.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SInvalReadLock</literal></entry>
|
||||
<entry>Waiting to retrieve messages from the shared catalog invalidation
|
||||
queue.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SInvalWriteLock</literal></entry>
|
||||
<entry>Waiting to add a message to the shared catalog invalidation
|
||||
queue.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SubtransBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a sub-transaction SLRU buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SubtransSLRULock</literal></entry>
|
||||
<entry>Waiting to access the sub-transaction SLRU cache.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SyncRepLock</literal></entry>
|
||||
<entry>Waiting to read or update information about synchronous
|
||||
replicas.</entry>
|
||||
<entry>Waiting to read or update information about the state of
|
||||
synchronous replication.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SyncScanLock</literal></entry>
|
||||
<entry>Waiting to get the start location of a scan on a table for
|
||||
synchronized scans.</entry>
|
||||
<entry>Waiting to select the starting location of a synchronized table
|
||||
scan.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>TablespaceCreateLock</literal></entry>
|
||||
<entry>Waiting to create or drop the tablespace.</entry>
|
||||
<entry>Waiting to create or drop a tablespace.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>TwoPhaseStateLock</literal></entry>
|
||||
@ -1933,104 +2038,30 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
|
||||
<entry><literal>WALBufMappingLock</literal></entry>
|
||||
<entry>Waiting to replace a page in WAL buffers.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>WALInsert</literal></entry>
|
||||
<entry>Waiting to insert WAL data into a memory buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>WALWriteLock</literal></entry>
|
||||
<entry>Waiting for WAL buffers to be written to disk.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>XidGenLock</literal></entry>
|
||||
<entry>Waiting to allocate or assign a transaction id.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>NotifyBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a <command>NOTIFY</command> message SLRU
|
||||
buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>buffer_content</literal></entry>
|
||||
<entry>Waiting to read or write a data page in memory.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>buffer_io</literal></entry>
|
||||
<entry>Waiting for I/O on a data page.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>buffer_mapping</literal></entry>
|
||||
<entry>Waiting to associate a data block with a buffer in the buffer
|
||||
pool.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>XactBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a transaction status SLRU buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>CommitTsBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a commit timestamp SLRU buffer.</entry>
|
||||
<entry><literal>XactSLRULock</literal></entry>
|
||||
<entry>Waiting to access the transaction status SLRU cache.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>lock_manager</literal></entry>
|
||||
<entry>Waiting to add or examine locks for backends, or waiting to
|
||||
join or exit a locking group (used by parallel query).</entry>
|
||||
<entry><literal>XactTruncationLock</literal></entry>
|
||||
<entry>Waiting to execute <function>pg_xact_status</function> or update
|
||||
the oldest transaction ID available to it.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>MultiXactMember</literal></entry>
|
||||
<entry>Waiting for I/O on a multixact member SLRU buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>MultiXactOffsetBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a multixact offset SLRU buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SerialBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a serializable transaction conflict SLRU
|
||||
buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>parallel_append</literal></entry>
|
||||
<entry>Waiting to choose the next subplan during Parallel Append plan
|
||||
execution.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>parallel_hash_join</literal></entry>
|
||||
<entry>Waiting to allocate or exchange a chunk of memory or update
|
||||
counters during Parallel Hash plan execution.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>parallel_query_dsa</literal></entry>
|
||||
<entry>Waiting for parallel query dynamic shared memory allocation lock.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>predicate_lock_manager</literal></entry>
|
||||
<entry>Waiting to add or examine predicate lock information.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>proc</literal></entry>
|
||||
<entry>Waiting to read or update the fast-path lock information.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>replication_origin</literal></entry>
|
||||
<entry>Waiting to read or update the replication progress.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>replication_slot_io</literal></entry>
|
||||
<entry>Waiting for I/O on a replication slot.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>serializable_xact</literal></entry>
|
||||
<entry>Waiting to perform an operation on a serializable transaction
|
||||
in a parallel query.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>SubtransBuffer</literal></entry>
|
||||
<entry>Waiting for I/O on a sub-transaction SLRU buffer.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>tbm</literal></entry>
|
||||
<entry>Waiting for TBM shared iterator lock.</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>wal_insert</literal></entry>
|
||||
<entry>Waiting to insert WAL into a memory buffer.</entry>
|
||||
<entry><literal>XidGenLock</literal></entry>
|
||||
<entry>Waiting to allocate a new transaction ID.</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
|
||||
Reference in New Issue
Block a user