Murtadha Hubail created ASTERIXDB-1338:
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Summary: Metadata Datasets are Evicted on Low Memory
Key: ASTERIXDB-1338
URL: https://issues.apache.org/jira/browse/ASTERIXDB-1338
Project: Apache AsterixDB
Issue Type: Bug
Reporter: Murtadha Hubail
Assignee: Murtadha Hubail
Priority: Critical
When many datasets are created and we need to evict unused ones from memory to
allocate their space for the newly created ones, metadata datasets are selected
as candidates for eviction. Once they are evicted, the system becomes unusable.
This is because of of the special treatment of metadata indexes since they are
registered only once during metadata bootstrap.
To reproduce the issue, just create many datasets and insert a record in them
to force their memory to be allocated. Eventually, the metadata datasets will
be evicted and the instance will be unusable.
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