IP属地：上海
-
-
-
PG流复制lag解析关于write_lag,flush_lag,replay_lag所指的范围，另外箭头尖的指向分别为send_lsn,write_lsn,flush_lsn,replay_lsn
-
-
关于write_lag,flush_lag,replay_lag所指的范围，另外箭头尖的指向分别为send_lsn,write_lsn,flush_lsn,replay_lsn