[jboss-jira] [JBoss JIRA] Created: (JBCACHE-1301) Checking debug level can improve performance under heavy load
Checking debug level can improve performance under heavy load
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Key: JBCACHE-1301
URL: http://jira.jboss.com/jira/browse/JBCACHE-1301
Project: JBoss Cache
Issue Type: Quality Risk
Security Level: Public (Everyone can see)
Affects Versions: 1.4.1.SP8
Environment: Any
Reporter: Martin Landua
Assigned To: Manik Surtani
In the source file ActivationInterceptor.java we experienced severe performance downgrade
due to the fact that the debug level is not being checked. The two log statements in lines
152 and 156 result in a call to toString() for the DataNode object. Worst case this can
create a huge string which is obsolete if debug is turned off in log4j. Since this occurs
in a synchronized block, performance slows down in a multithreaded environment.
Please consider the following change (checking for debug level):
synchronized(this) {
if (fqn != null && nodeRemoved)
// If the node is being removed, just remove it and don't perform
// activation processing
loader.remove(fqn);
else if (fqn != null && cache.exists(fqn) && loader.exists(fqn))
{
// Remove the node from the cache loader if it exists in memory,
// its attributes have been initialized, its children have been loaded,
// AND it was found in the cache loader (nodeLoaded = true).
// Then notify the listeners that the node has been activated.
DataNode n = getNode(fqn); // don't load
// node not null and attributes have been loaded?
if (n != null && !n.containsKey(TreeCache.UNINITIALIZED)) {
if (n.hasChildren()) {
if (allInitialized(n)) {
if (log.isDebugEnabled()) log.debug("children all
initialized");
remove(fqn);
}
} else if (loaderNoChildren(fqn)) {
if (log.isDebugEnabled()) log.debug("no children " + n);
remove(fqn);
}
}
}
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