Github user cestella commented on the issue:
https://github.com/apache/metron/pull/929
You can set it to not manually commit (set `solr.commitPerBatch` to `false`
and no committing happens), but you're risking losing data if a worker dies.
Honestly, want a durable commit with a fsync before you ack the tuples in a
batch, otherwise you're courting data loss. This is the same strategy we do
for ES and HDFS (though commit there is a fsync). That being said, I'm
sensitive to performance issues around that that people may have, so I let
people turn it off with a strong warning in the docs (also this was legacy
behavior in the SolrWriter).
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