octoleo
/
gh-ost
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

grammar

This commit is contained in:
Shlomi Noach 2017-01-04 08:30:23 +02:00
parent 9177f7553f
commit 914f692af2
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
doc/subsecond-lag.md
View File

@ -14,6 +14,6 @@ In both cases, `gh-ost` uses an internal heartbeat mechanism. It injects heartbe
You can explicitly define how frequently will `gh-ost` inject heartbeat events, via `heartbeat-interval-millis`. You should set `heartbeat-interval-millis <= max-lag-millis`. It still works if not, but loses granularity and effect.
In earlier versions, the `--throttle-control-replicas` list was subjected to `1` second resolution or to 3rd party heartbeat injections such as `pt-heartbeat`. This is no longer the case. The argument `--replication-lag-query` has been deprecated and no longer needed.
In earlier versions, the `--throttle-control-replicas` list was subjected to `1` second resolution or to 3rd party heartbeat injections such as `pt-heartbeat`. This is no longer the case. The argument `--replication-lag-query` has been deprecated and is no longer needed.
Our production migrations use sub-second lag throttling and are able to keep our entire fleet of replicas well below `1sec` lag. We use `--heartbeat-interval-millis=100` on our production migrations with a `--max-lag-millis` value of between `300` and `500`.