Author: jbellis
Date: Thu Jan 6 22:57:18 2011
New Revision: 1056109
URL: http://svn.apache.org/viewvc?rev=1056109&view=rev
Log:
reduce flush lock contention
patch by Kelvin Kakugawa; reviewed by jbellis for CASSANDRA-1930
Modified:
cassandra/branches/cassandra-0.7/CHANGES.txt
cassandra/branches/cassandra-0.7/src/java/org/apache/cassandra/db/Table.java
Modified: cassandra/branches/cassandra-0.7/CHANGES.txt
URL:
http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.7/CHANGES.txt?rev=1056109&r1=1056108&r2=1056109&view=diff
==============================================================================
--- cassandra/branches/cassandra-0.7/CHANGES.txt (original)
+++ cassandra/branches/cassandra-0.7/CHANGES.txt Thu Jan 6 22:57:18 2011
@@ -13,6 +13,7 @@
* make read repair behave as expected for ConsistencyLevel > ONE
(CASSANDRA-982)
* distributed test harness (CASSANDRA-1859)
+ * reduce flush lock contention (CASSANDRA-1930)
0.7.0-dev
Modified:
cassandra/branches/cassandra-0.7/src/java/org/apache/cassandra/db/Table.java
URL:
http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.7/src/java/org/apache/cassandra/db/Table.java?rev=1056109&r1=1056108&r2=1056109&view=diff
==============================================================================
---
cassandra/branches/cassandra-0.7/src/java/org/apache/cassandra/db/Table.java
(original)
+++
cassandra/branches/cassandra-0.7/src/java/org/apache/cassandra/db/Table.java
Thu Jan 6 22:57:18 2011
@@ -64,7 +64,7 @@ public class Table
* accesses to CFS.memtable should acquire this for thread safety.
* Table.maybeSwitchMemtable should aquire the writeLock; see that method
for the full explanation.
*/
- static final ReentrantReadWriteLock flusherLock = new
ReentrantReadWriteLock(true);
+ static final ReentrantReadWriteLock flusherLock = new
ReentrantReadWriteLock();
// It is possible to call Table.open without a running daemon, so it makes
sense to ensure
// proper directories here as well as in CassandraDaemon.
