Todd Lipcon created KUDU-2383:
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Summary: Document and possibly track memory usage of maintenance
threads
Key: KUDU-2383
URL: https://issues.apache.org/jira/browse/KUDU-2383
Project: Kudu
Issue Type: Improvement
Components: tserver
Reporter: Todd Lipcon
Maintenance Manager threads use memory in both read-side and write-side block
decoders and encoders. In a server running a workload with a table with ~250
string columns, I see each thread using between 100-200MB of RAM. If a user
isn't aware of this memory usage they may under-provision the heap.
We should probably reserve some amount of memory for the MM threads,
potentially track them via a MemTracker, and warn if the total configured heap
(cache + MM threads estimate) is too close to the soft limit, leaving no room
for MRS/DMS.
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