Marcel Reutegger created OAK-3112:
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Summary: Performance degradation of UnsavedModifications on MapDB
Key: OAK-3112
URL: https://issues.apache.org/jira/browse/OAK-3112
Project: Jackrabbit Oak
Issue Type: Bug
Components: core, mongomk
Affects Versions: 1.0.17, 1.0.16, 1.0.15, 1.0.14, 1.0.13, 1.0.12, 1.0.11,
1.0.10, 1.0.9, 1.0.8, 1.0.7
Reporter: Marcel Reutegger
Assignee: Marcel Reutegger
Fix For: 1.0.18
UnsavedModifications performance degrades when used in combination with the
MapDB backed MapFactory. Calls become more and more expensive the longer the
instance is in use. The is caused by a limitation of MapDB, which does not
remove empty BTree nodes.
A test performed with random paths added to the map and later removed again in
a loop shows a increase to roughly 1 second to read keys present in the map
when the underlying data file is about 50MB in size.
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