Now throttling indexing ... stop throttling indexing

Enonic version: 6.4.2
OS: Mac and Linux

When I create a lot of content I get a bunch of these in the log:

19:52:02.750 INFO  org.elasticsearch.index.engine - [local-node] [search-cms-repo][0] now throttling indexing: numMergesInFlight=6, maxNumMerges=5
19:52:02.760 INFO  no.posten.website - (/services/servicename/servicename.js) created: contentType: no.posten.website:... key: /posten-no/...
19:52:02.780 INFO  org.elasticsearch.index.engine - [local-node] [search-cms-repo][0] stop throttling indexing: numMergesInFlight=4, maxNumMerges=5

What does that mean?
I don’t loose any data right?

Nothing wrong, Just internal moving of data in index segments. Better/faster handling of bulk import data is in the backlog.