I tried check the program with JVisualVM, but I needed to supply -Xshare:off to the JVM, which Eclipse won't do correctly.
So I ran the test program from command prompt, and voilà, it ran full speed. I ran the program using the same command that eclipse used (except I used java instead of javaw). So it would appear that using an embedded ZooKeeper server in a program that you start from eclipse causes some sort of conflict. I'm really not sure what the source of this conflict is. On Fri, Jun 8, 2012 at 6:25 PM, Patrick Hunt <[email protected]> wrote: > 6ms sounds about right for a non-warmed up vm. I have no idea why the > embedded case would take 100ms though. Perhaps use strace or similar > on the vm process to see what's going on under the covers? I'm > assuming you're not doing something crazy in the embedded vm, and that > it's not gcing/swapping for long periods of time (which might be an > invalid assumption, so you should check that as well). > > Patrick > > On Fri, Jun 8, 2012 at 2:58 PM, David Nickerson > <[email protected]> wrote: > > I have a speed test where I create and delete a single znode many times, > > sequentially. If I connect to an embedded ZooKeeper server on the same > > machine, each create/delete cycle takes over 100 ms. However, if I > connect > > to a non-embedded ZooKeeper server on the same machine, each > > create/delete cycle takes only 6 ms. > > > > This is the code that I use to start the embedded server: > > > > package main; > > > > import java.io.IOException; > > > > import org.apache.zookeeper.server.ServerConfig; > > import org.apache.zookeeper.server.ZooKeeperServerMain; > > import > org.apache.zookeeper.server.quorum.QuorumPeerConfig.ConfigException; > > > > public class ZooServer extends ZooKeeperServerMain implements Runnable { > > private static ZooServer zooServer; > > private static ServerConfig config; > > > > public static void start(String configPath) { > > config = new ServerConfig(); > > try { > > config.parse(configPath); > > } catch (ConfigException e) { > > e.printStackTrace(); > > } > > zooServer = new ZooServer(); > > (new Thread(zooServer)).start(); > > } > > > > public static void stop() { > > zooServer.shutdown(); > > } > > > > @Override > > public void run() { > > try { > > zooServer.runFromConfig(config); > > } catch (IOException e) { > > e.printStackTrace(); > > } > > } > > } > > > > The config file looks like this: > > tickTime=2000 > > dataDir=ZooKeeper files > > clientPort=2181 > > > > If you would like, I can share the testing classes. > > > > Anyone know why the embedded server is running so slowly? >
