提交 278e2a6c authored 作者: Thomas Mueller's avatar Thomas Mueller

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上级 fcedb332
......@@ -16,7 +16,8 @@ Change Log
<h1>Change Log</h1>
<h2>Next Version (unreleased)</h2>
<ul><li>The error message when the server doesn't start has been improved.
<ul><li>H2 Console: The progress display when opening a database has been improved.
</li><li>The error message when the server doesn't start has been improved.
</li><li>Key values can now be changed in updatable result sets.
</li><li>Changes in updatable result sets are now visible even when resetting the result set.
</li><li>Temporary files were sometimes deleted too late when executing large insert, update,
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......@@ -31,6 +31,8 @@ Frequently Asked Questions
What is the Size Limit (Maximum Size) of a Database?</a><br />
<a href="#reliable">
Is it Reliable?</a><br />
<a href="#slow_open">
Why is Opening my Database Slow?</a><br />
<a href="#gcj">
Is the GCJ Version Stable? Faster?</a><br />
<a href="#translate">
......@@ -158,6 +160,25 @@ Areas considered Experimental:
</li><li>The ARRAY data type and related functionality
</li></ul>
<br /><a name="slow_open"></a>
<h3>Why is Opening my Database Slow?</h3>
<p>
If it takes a long time to open a database, in most cases it was not closed the last time.
This is specially a problem for larger databases.
To close a database, close all connections to it before the application ends, or execute
the command SHUTDOWN. The database is also closed when the virtual machine exits normally
by using a shutdown hook. However killing a Java process or calling Runtime.halt will prevent this.
</p>
<p>
To find out what the problem is, open the database in embedded mode using the H2 Console.
This will print progress information. If you have many 'Creating index' lines it is an indication that the
database was not closed the last time.
</p>
<p>
Other possible reasons are: the database is very big (many GB), or contains linked tables
that are slow to open.
</p>
<br /><a name="gcj"></a>
<h3>Is the GCJ Version Stable? Faster?</h3>
<p>
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......@@ -373,7 +373,8 @@ Of course, patches are always welcome, but are not always applied as is. Patches
</li><li>Support to assign a primary key index a user defined name.
</li><li>Cluster: Add feature to make sure cluster nodes can not get out of sync (for example by stopping one process).
</li><li>H2 Console: support configuration option for fixed width (monospace) font.
</li><li>Native fulltext search: support analyzers (specially for Chinese, Japanese)
</li><li>Native fulltext search: support analyzers (specially for Chinese, Japanese).
</li><li>Automatically compact databases from time to time (as a background process).
</li></ul>
<h2>Not Planned</h2>
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......@@ -548,4 +548,4 @@ usable weblica jena preserved instrumentation inspect jayaprakash ashwin
varargs automate couldn unclear eat dtp disks tablespaces great reproduces
hhh overridden sqle propogation buildid tsv monospace microarrays pathogen
geocoder geocoding longitude estimating microarray latitude magnolia pfgrc
refill analyzers patches popular came growing
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