The pg_lsn data type can be used to store LSN (Log Sequence
- Number) data which is a pointer to a location in the XLOG. This type is a
+ Number) data which is a pointer to a location in the WAL. This type is a
representation of XLogRecPtr and an internal system type of
- Current xlog flush location. Useful to get a known location in the
+ Current WAL flush location. Useful to get a known location in the
transaction log where streaming can start.
pd_lsn
PageXLogRecPtr
8 bytes
- LSN: next byte after last byte of xlog record for last change
+ LSN: next byte after last byte of WAL record for last change
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