collector.wal: add pg_wal_lsn_location_bytes - WAL LSN bytes #1188
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This is used commonly to monitor WAL writing intensity or rate in MB/s, an essential indicator basically for planning WAL archiving / RPO disk capacity. Signed-off-by: Kaarel Moppel <kaarel.moppel@gmail.com>
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This is used commonly to monitor WAL writing intensity or rate in MB/s, an essential indicator basically for planning WAL archiving / RPO disk capacity.