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beautify

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Shlomi Noach 2016-09-01 13:45:37 +02:00
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doc/subsecond-lag.md
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@ -26,6 +26,8 @@ As a common example, many use [pt-heartbeat](https://www.percona.com/doc/percona
Note `--interval=0.1` to indicate `10` heartbeats per second.
You would then provide `--replication-lag-query="select unix_timestamp(now(6)) - unix_timestamp(ts) as ghost_lag_check from your_schema.heartbeat order by ts desc limit 1"`
You would then provide
gh-ost ... --replication-lag-query="select unix_timestamp(now(6)) - unix_timestamp(ts) as ghost_lag_check from your_schema.heartbeat order by ts desc limit 1"
Our production migrations use sub-second lag throttling and are able to keep our entire fleet of replicas well below `1sec` lag.