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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 37 |
1 files changed, 37 insertions, 0 deletions
@@ -1,3 +1,40 @@ +WiredTiger release 1.3.8, 2012-11-22 +------------------------------------ + +This release improves the performance of LSM trees, changes how statistics are +reported and adds a shared cache implementation: + +New features and API changes: + +[232] Add a "size of checkpoint" statistic. + +* Add a shared cache pool implemention. Manages a single cache among + multiple databases within a process. + +* Merge statistics from file and LSM sources into a "data source" statistic + structure. Rename and regroup some shared stastistics. Add a helper to + the Python API to lookup in a cursor in a simple expression. + +* Add support for sub groups of options in configuration strings. + +Performance tuning for LSM trees: + +* Don't try to merge with a chunk that is much larger than a small chunk. + +* After an LSM merge, fault in some pages before the new tree goes live to + avoid stalling application threads. + +* Don't automatically fail inserts if the write generation check fails: + compare keys instead. + +* Switch the LSM tree lock to a read/write lock, so cursors can read the + state of the tree in parallel. + +Bug fixes: + +* Fix a bug where we could write past the end of a buffer after it was grown. + + WiredTiger release 1.3.7, 2012-11-09 ------------------------------------ |