提交 bff8b874 authored 作者: Evgenij Ryazanov's avatar Evgenij Ryazanov

Update multi-threaded mode defaults in features.html

上级 f2133cb2
...@@ -858,10 +858,14 @@ This database synchronizes access to the same connection, but other databases ma ...@@ -858,10 +858,14 @@ This database synchronizes access to the same connection, but other databases ma
To get higher concurrency, you need to use multiple connections. To get higher concurrency, you need to use multiple connections.
</p> </p>
<p> <p>
By default, requests to the same database are synchronized. An application can use multiple threads that access the same database at the same time.
That means an application can use multiple threads that access the same database With default MVStore engine threads that use different connections can use the database concurrently.
at the same time, however if one thread executes a long running query, the other threads need to wait. With PageStore engine requests to the same database are synchronized,
To enable concurrent database usage, see the setting <code>MULTI_THREADED</code>. that means that if one thread executes a long running query, the other threads need to wait.
Concurrent database usage may be enabled for PageStore or disabled for MVStore
with <code>MULTI_THREADED</code> setting.
Note that multi-threaded mode for PageStore engine is not tested well and has some issues;
it should be used with caution.
</p> </p>
<h3>Locking, Lock-Timeout, Deadlocks</h3> <h3>Locking, Lock-Timeout, Deadlocks</h3>
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