提交 dd0d0e43 authored 作者: Thomas Mueller's avatar Thomas Mueller

Documentation

上级 ed51a17b
......@@ -17,12 +17,15 @@ Change Log
<h1>Change Log</h1>
<h2>Next Version (unreleased)</h2>
<ul><li>The database URL setting PAGE_SIZE setting is now also used for the MVStore.
<ul><li>Views and derived tables with equality and range conditions on the same columns
did not work properly. example: select x from (select x from (select 1 as x)
where x &gt; 0 and x &lt; 2) where x = 1
</li><li>The database URL setting PAGE_SIZE setting is now also used for the MVStore.
</li><li>MVStore: the default page split size for persistent stores is now 4096
(it was 16 KB so far). This should reduce the database file size for most situations
(in some cases, less than half the size of the previous version).
</li><li>With query literals disabled, auto-analyze of a table with CLOB or BLOB did not work.
</li><li>MVStore: use a mark & sweep GC algorithm instead of reference counting,
</li><li>MVStore: use a mark and sweep GC algorithm instead of reference counting,
to ensure used chunks are never overwrite, even if the reference counting
algorithm does not work properly.
</li><li>In the multi-threaded mode, updating the column selectivity ("analyze")
......
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