usually preferable as it minimizes the impact on the running system. If you
want to start the backup as soon as possible, pass <literal>true</literal> as
the second parameter to <function>pg_backup_start</function> and it will
- request an immediate checkpoint, which will finish as fast as possible using
+ request a fast checkpoint, which will finish as fast as possible using
as much I/O as possible.
</para>
will be stored.)
If the optional second parameter is given as <literal>true</literal>,
it specifies executing <function>pg_backup_start</function> as quickly
- as possible. This forces an immediate checkpoint which will cause a
+ as possible. This forces a fast checkpoint which will cause a
spike in I/O operations, slowing any concurrently executing queries.
</para>
<para>
</para>
<para>
- The <command>CHECKPOINT</command> command forces an immediate
+ The <command>CHECKPOINT</command> command forces a fast
checkpoint when the command is issued, without waiting for a
regular checkpoint scheduled by the system (controlled by the settings in
<xref linkend="runtime-config-wal-checkpoints"/>).
<term><option>--checkpoint={fast|spread}</option></term>
<listitem>
<para>
- Sets checkpoint mode to fast (immediate) or spread (the default)
+ Sets checkpoint mode to fast or spread
(see <xref linkend="backup-lowlevel-base-backup"/>).
+ The default is spread.
</para>
</listitem>
</varlistentry>
else
{
RequestCheckpoint(CHECKPOINT_END_OF_RECOVERY |
- CHECKPOINT_IMMEDIATE |
+ CHECKPOINT_FAST |
CHECKPOINT_WAIT);
}
WalSndWaitStopping();
if (RecoveryInProgress())
- CreateRestartPoint(CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_IMMEDIATE);
+ CreateRestartPoint(CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_FAST);
else
{
/*
if (XLogArchivingActive())
RequestXLogSwitch(false);
- CreateCheckPoint(CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_IMMEDIATE);
+ CreateCheckPoint(CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_FAST);
}
}
(errmsg("restartpoint starting:%s%s%s%s%s%s%s%s",
(flags & CHECKPOINT_IS_SHUTDOWN) ? " shutdown" : "",
(flags & CHECKPOINT_END_OF_RECOVERY) ? " end-of-recovery" : "",
- (flags & CHECKPOINT_IMMEDIATE) ? " immediate" : "",
+ (flags & CHECKPOINT_FAST) ? " fast" : "",
(flags & CHECKPOINT_FORCE) ? " force" : "",
(flags & CHECKPOINT_WAIT) ? " wait" : "",
(flags & CHECKPOINT_CAUSE_XLOG) ? " wal" : "",
(errmsg("checkpoint starting:%s%s%s%s%s%s%s%s",
(flags & CHECKPOINT_IS_SHUTDOWN) ? " shutdown" : "",
(flags & CHECKPOINT_END_OF_RECOVERY) ? " end-of-recovery" : "",
- (flags & CHECKPOINT_IMMEDIATE) ? " immediate" : "",
+ (flags & CHECKPOINT_FAST) ? " fast" : "",
(flags & CHECKPOINT_FORCE) ? " force" : "",
(flags & CHECKPOINT_WAIT) ? " wait" : "",
(flags & CHECKPOINT_CAUSE_XLOG) ? " wal" : "",
* flags is a bitwise OR of the following:
* CHECKPOINT_IS_SHUTDOWN: checkpoint is for database shutdown.
* CHECKPOINT_END_OF_RECOVERY: checkpoint is for end of WAL recovery.
- * CHECKPOINT_IMMEDIATE: finish the checkpoint ASAP,
- * ignoring checkpoint_completion_target parameter.
+ * CHECKPOINT_FAST: finish the checkpoint ASAP, ignoring
+ * checkpoint_completion_target parameter.
* CHECKPOINT_FORCE: force a checkpoint even if no XLOG activity has occurred
* since the last one (implied by CHECKPOINT_IS_SHUTDOWN or
* CHECKPOINT_END_OF_RECOVERY).
* backup state and tablespace map.
*
* Input parameters are "state" (the backup state), "fast" (if true, we do
- * the checkpoint in immediate mode to make it faster), and "tablespaces"
- * (if non-NULL, indicates a list of tablespaceinfo structs describing the
- * cluster's tablespaces.).
+ * the checkpoint in fast mode), and "tablespaces" (if non-NULL, indicates a
+ * list of tablespaceinfo structs describing the cluster's tablespaces.).
*
* The tablespace map contents are appended to passed-in parameter
* tablespace_map and the caller is responsible for including it in the backup
* during recovery means that checkpointer is running, we can use
* RequestCheckpoint() to establish a restartpoint.
*
- * We use CHECKPOINT_IMMEDIATE only if requested by user (via
- * passing fast = true). Otherwise this can take awhile.
+ * We use CHECKPOINT_FAST only if requested by user (via passing
+ * fast = true). Otherwise this can take awhile.
*/
RequestCheckpoint(CHECKPOINT_FORCE | CHECKPOINT_WAIT |
- (fast ? CHECKPOINT_IMMEDIATE : 0));
+ (fast ? CHECKPOINT_FAST : 0));
/*
* Now we need to fetch the checkpoint record location, and also
* any CREATE DATABASE commands.
*/
if (!IsBinaryUpgrade)
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE |
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_FORCE |
CHECKPOINT_WAIT | CHECKPOINT_FLUSH_UNLOGGED);
/*
* strategy that avoids these problems.
*/
if (!IsBinaryUpgrade)
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE |
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_FORCE |
CHECKPOINT_WAIT);
}
* Force a checkpoint to make sure the checkpointer has received the
* message sent by ForgetDatabaseSyncRequests.
*/
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
/* Close all smgr fds in all backends. */
WaitForProcSignalBarrier(EmitProcSignalBarrier(PROCSIGNAL_BARRIER_SMGRRELEASE));
* On Windows, this also ensures that background procs don't hold any open
* files, which would cause rmdir() to fail.
*/
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE | CHECKPOINT_WAIT
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_FORCE | CHECKPOINT_WAIT
| CHECKPOINT_FLUSH_UNLOGGED);
/* Close all smgr fds in all backends. */
* any unlogged operations done in the new DB tablespace before the
* next checkpoint.
*/
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
/*
* Force synchronous commit, thus minimizing the window between
* mustn't delete. So instead, we force a checkpoint which will clean
* out any lingering files, and try again.
*/
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
/*
* On Windows, an unlinked file persists in the directory listing
static void ProcessCheckpointerInterrupts(void);
static void CheckArchiveTimeout(void);
static bool IsCheckpointOnSchedule(double progress);
-static bool ImmediateCheckpointRequested(void);
+static bool FastCheckpointRequested(void);
static bool CompactCheckpointerRequestQueue(void);
static void UpdateSharedMemoryConfig(void);
}
/*
- * Returns true if an immediate checkpoint request is pending. (Note that
- * this does not check the *current* checkpoint's IMMEDIATE flag, but whether
- * there is one pending behind it.)
+ * Returns true if a fast checkpoint request is pending. (Note that this does
+ * not check the *current* checkpoint's FAST flag, but whether there is one
+ * pending behind it.)
*/
static bool
-ImmediateCheckpointRequested(void)
+FastCheckpointRequested(void)
{
volatile CheckpointerShmemStruct *cps = CheckpointerShmem;
* We don't need to acquire the ckpt_lck in this case because we're only
* looking at a single flag bit.
*/
- if (cps->ckpt_flags & CHECKPOINT_IMMEDIATE)
+ if (cps->ckpt_flags & CHECKPOINT_FAST)
return true;
return false;
}
* checkpoint_completion_target.
*
* The checkpoint request flags should be passed in; currently the only one
- * examined is CHECKPOINT_IMMEDIATE, which disables delays between writes.
+ * examined is CHECKPOINT_FAST, which disables delays between writes.
*
* 'progress' is an estimate of how much of the work has been done, as a
* fraction between 0.0 meaning none, and 1.0 meaning all done.
* Perform the usual duties and take a nap, unless we're behind schedule,
* in which case we just try to catch up as quickly as possible.
*/
- if (!(flags & CHECKPOINT_IMMEDIATE) &&
+ if (!(flags & CHECKPOINT_FAST) &&
!ShutdownXLOGPending &&
!ShutdownRequestPending &&
- !ImmediateCheckpointRequested() &&
+ !FastCheckpointRequested() &&
IsCheckpointOnSchedule(progress))
{
if (ConfigReloadPending)
* flags is a bitwise OR of the following:
* CHECKPOINT_IS_SHUTDOWN: checkpoint is for database shutdown.
* CHECKPOINT_END_OF_RECOVERY: checkpoint is for end of WAL recovery.
- * CHECKPOINT_IMMEDIATE: finish the checkpoint ASAP,
+ * CHECKPOINT_FAST: finish the checkpoint ASAP,
* ignoring checkpoint_completion_target parameter.
* CHECKPOINT_FORCE: force a checkpoint even if no XLOG activity has occurred
* since the last one (implied by CHECKPOINT_IS_SHUTDOWN or
- * CHECKPOINT_END_OF_RECOVERY).
+ * CHECKPOINT_END_OF_RECOVERY, and the CHECKPOINT command).
* CHECKPOINT_WAIT: wait for completion before returning (otherwise,
* just signal checkpointer to do it, and return).
* CHECKPOINT_CAUSE_XLOG: checkpoint is requested due to xlog filling.
* There's no point in doing slow checkpoints in a standalone backend,
* because there's no other backends the checkpoint could disrupt.
*/
- CreateCheckPoint(flags | CHECKPOINT_IMMEDIATE);
+ CreateCheckPoint(flags | CHECKPOINT_FAST);
/* Free all smgr objects, as CheckpointerMain() normally would. */
smgrdestroyall();
* BufferSync -- Write out all dirty buffers in the pool.
*
* This is called at checkpoint time to write out all dirty shared buffers.
- * The checkpoint request flags should be passed in. If CHECKPOINT_IMMEDIATE
- * is set, we disable delays between writes; if CHECKPOINT_IS_SHUTDOWN,
+ * The checkpoint request flags should be passed in. If CHECKPOINT_FAST is
+ * set, we disable delays between writes; if CHECKPOINT_IS_SHUTDOWN,
* CHECKPOINT_END_OF_RECOVERY or CHECKPOINT_FLUSH_UNLOGGED is set, we write
* even unlogged buffers, which are otherwise skipped. The remaining flags
* currently have no effect here.
errdetail("Only roles with privileges of the \"%s\" role may execute this command.",
"pg_checkpoint")));
- RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_WAIT |
+ RequestCheckpoint(CHECKPOINT_FAST | CHECKPOINT_WAIT |
(RecoveryInProgress() ? 0 : CHECKPOINT_FORCE));
break;
#define CHECKPOINT_IS_SHUTDOWN 0x0001 /* Checkpoint is for shutdown */
#define CHECKPOINT_END_OF_RECOVERY 0x0002 /* Like shutdown checkpoint, but
* issued at end of WAL recovery */
-#define CHECKPOINT_IMMEDIATE 0x0004 /* Do it without delays */
+#define CHECKPOINT_FAST 0x0004 /* Do it without delays */
#define CHECKPOINT_FORCE 0x0008 /* Force even if no activity */
#define CHECKPOINT_FLUSH_UNLOGGED 0x0010 /* Flush unlogged tables */
/* These are important to RequestCheckpoint */
# Check the logs that the restart point has started on standby. This is
# optional, but let's be sure.
ok( $node_standby->log_contains(
- "restartpoint starting: immediate wait", $logstart),
+ "restartpoint starting: fast wait", $logstart),
"restartpoint has started");
# Trigger promotion during the restart point.
projects / thirdparty / postgresql.git / commitdiff
