Commit c97495b

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replication_lag query fixed

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Original file line number	Diff line number	Diff line change
`@@ -2504,11 +2504,12 @@ $ crontab -l`
`2504`	`2504`	`### Как узнать отставание реплики?`
`2505`	`2505`
`2506`	`2506`	`Запускать на реплике:`
`2507`		`-`
`2508`	`2507`	```sql
`2509`		`-select now() - pg_last_xact_replay_timestamp() as replication_lag_interval,`
	`2508`	`+select case when not pg_is_in_recovery() or pg_last_wal_receive_lsn() = pg_last_wal_replay_lsn() then '0'::interval`
	`2509`	`+ else now() - pg_last_xact_replay_timestamp()`
	`2510`	`+ end as replication_lag_interval,`
`2510`	`2511`	`current_setting('max_standby_archive_delay') as max_standby_archive_delay,`
`2511`		`- current_setting('max_standby_streaming_delay') as max_standby_streaming_delay`
	`2512`	`+ current_setting('max_standby_streaming_delay') as max_standby_streaming_delay;`
`2512`	`2513`	```
`2513`	`2514`
`2514`	`2515`	`### Как узнать процент достижения своего максимального значения для последовательностей?`

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