I use these queries to monitor the streaming replication:
on master:
select client_addr, state, sent_location, write_location, flush_location, replay_location, sync_priority from pg_stat_replication;
On slave:
select now() - pg_last_xact_replay_timestamp() AS replication_delay;
Can I create a table to store that data?
sure, why not ? do you want this table to just have one row with the last value you stored? or do you want to store a history with timestamp ?
I also need the data is constantly put into this table. How would be the best way to do it?
um, that data changes continuously, what do you mean, 'constantly' ? if you mean once a minute or something, use a script that samples the data and stores it in your table, and waits a minute, then repeats. if you mean literally continously, why not just query the data as you have, thats the 'live' value ... you oculd use a view, I suppose.
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john r pierce, recycling bits in santa cruz
Yep.. once a minute or so. And yes, I need to store a history with timestamp.