Обсуждение: monitoring replicatgion : lag calculation
hello, question about WAL on pg 9.0 : the doc at http://www.postgresql.org/docs/9.1/static/warm-standby.html#SYNCHRONOUS-REPLICATION (section 25.2.5.2. Monitoring) says: You can calculate this lag by comparing the current WAL write location on the primary with the last WAL location received by the standby. but the WAL values i get are not 177/13C4E158 , 177/13C52BC0 so how to calculate the lag ? should i apply a basic hex conversion first ? Cheers, Ben-
On Mon, Sep 12, 2011 at 10:04 AM, Ben Ciceron <ben@triggit.com> wrote: > hello, > > question about WAL on pg 9.0 : > > the doc at http://www.postgresql.org/docs/9.1/static/warm-standby.html#SYNCHRONOUS-REPLICATION > (section 25.2.5.2. Monitoring) says: > > You can calculate this lag by comparing the current WAL write > location on the primary with the last WAL location received by the > standby. > > but the WAL values i get are not 177/13C4E158 , 177/13C52BC0 so how to > calculate the lag ? should i apply a basic hex conversion first ? Pretty much. See: http://archives.postgresql.org/pgsql-hackers/2010-11/msg00252.php
perfect - thx! Cheers, Ben- On Mon, Sep 12, 2011 at 10:41 AM, Lonni J Friedman <netllama@gmail.com> wrote: > On Mon, Sep 12, 2011 at 10:04 AM, Ben Ciceron <ben@triggit.com> wrote: >> hello, >> >> question about WAL on pg 9.0 : >> >> the doc at http://www.postgresql.org/docs/9.1/static/warm-standby.html#SYNCHRONOUS-REPLICATION >> (section 25.2.5.2. Monitoring) says: >> >> You can calculate this lag by comparing the current WAL write >> location on the primary with the last WAL location received by the >> standby. >> >> but the WAL values i get are not 177/13C4E158 , 177/13C52BC0 so how to >> calculate the lag ? should i apply a basic hex conversion first ? > > Pretty much. See: > http://archives.postgresql.org/pgsql-hackers/2010-11/msg00252.php >