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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 82 |
1 files changed, 82 insertions, 0 deletions
@@ -1,3 +1,85 @@ +WiredTiger release 2.5.2, 2015-03-23 +------------------------------------ + +The WiredTiger 2.5.2 release contains important bug fixes. + +API changes: + +* Allow memory_page_max to be at most a quater of the cache size not half. + This avoids operations getting stalled due to the cache being filled with + one or two pages. + +Bug fixes and other important changes: + +* When skipping a dirty page during a checkpoint, make sure the tree is marked + dirty. + refs SUPPORT-1248, SERVER-17319, SERVER-17506, #1404, #1643, #1721, #1735 + +* Fix a bug in range truncate where we could remove the wrong records. + refs SERVER-17345 + +* Fix a bug in LSM management where we could let the cache get full - leading + to a operations being blocked. + refs #1720 + +* Fix several bugs in the checkpoint implementation that could lead to a tree + being marked clean when it had updates in memory. If shutdown occurred at + a specific time those updates would be discarded without being written. + refs SUPPORT-1248 + +* Fix some bugs in logging - where system crashes could leave empty files that + would stop recovery working on re-start. + refs #1717, #1719, SERVER-17451 + +* Fix a bug in recovery. Force recovery instead of returning an error if the + LSN given doesn't exist. + refs #1700, #1704 + +* Move writing into log worker thread to avoid latency in application threads. + refs #1683 + +* Fix a bug in the reconfigure API related to adhering to shared cache quotas. + refs #1712, #1713 + +* Fix a bug in WiredTiger statistics where we weren't recording overflow + record statistics. + refs #1520, #1703, #1711 + +* Several enhancements to eviction of large pages including: + - Don't do forced eviction of a page if it is the current walk point. + - Don't update the read generation on page in if it's set to oldest. + - Clear the walk positions before the eviction server sleeps. + - Reverse the direction of the LRU walk regularly. + - Add all pages that would block to the eviction queue. + - If evicting dirty pages use the worker threads not the server. + refs #1706 + +* Use raw mode when dumping indices. + refs #1709 + +* Fix a bug where we could race opening files while a WT_CONNECTION::close is + in progress. + refs SERVER-17319 + +* Fix a bug in LSM where snapshot transaction updates could have the wrong + visibility check applied. Leading to invalid updates. + refs #1641, #1701, #1702 + +* Fix a bug in checkpoint where it could get an EBUSY return unnecessarily. + refs #1404, #1589, #1705 + +* Fix a bug when writing a page from memory to disk (reconciling). We could + overwrite the end of a temporary buffer in some cases. + refs #1697, #1699 + +* Sometimes we would choose a sub-optimal layout for on disk pages when + writing them out from memory. + refs #1699 + +* Improve the performance of in-memory lookups by making the content of the + page structure more cache friendly. + + WiredTiger release 2.5.1, 2015-03-07 ------------------------------------ |