Have a snapshot of running transactions and compose it to WAL, without having to look ahead to bgwriter or checkpointer to log a person. This is beneficial for rational decoding on standby, as reasonable slot generation has to wait right up until this kind of report is replayed to the standby.
Note that Recurrent phone calls to this functionality could incur considerable overhead, as it could generate numerous log messages.
If recovery has finished then this tends to remain static at the location of the final WAL file used in the course of Restoration. Once the server has long been started normally devoid of recovery, the functionality returns NULL.
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Obtains an exceptional session-level advisory lock if out there. This may both acquire the lock quickly and return correct, or return false devoid of ready In case the lock can not be obtained right away.
The functions shown in Table nine.92 deliver information about The existing status of the standby server. These functions might be executed both of those for the duration of recovery As well as in typical operating.
Exhibits the amount of bytes accustomed to shop any person information benefit. If applied straight to a table column price, this demonstrates any compression that was done.
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If recovery has done then this may keep on being static at The situation of the last WAL history obtained and synced to disk during Restoration. If streaming replication is disabled, or if it hasn't but started out, the functionality returns NULL.
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Emits a sensible decoding concept. This may be accustomed to move generic messages to logical decoding plugins through WAL. The transactional
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