如何降低将Appstats对谷歌应用程序引擎的Java的内存使用情况(How to reduce t

这被质疑相关的Java AppEngine上造成的Appstats的Java内存不足的错误。

将Appstats似乎引起128MB情况下，一个java.lang.OutOfMemoryError，我不知道是否有方法可以减少采伐量。有没有一种方法来过滤从堆栈跟踪一些包的名字呢？

GAE的API：

 @14ms memcache.Get real=7ms api=0ms
Stack:
  com.google.appengine.tools.appstats.Recorder:290 makeAsyncCall()
  com.google.apphosting.api.ApiProxy:184 makeAsyncCall()
  com.google.apphosting.api.ApiProxy:123 makeAsyncCall()
  com.google.appengine.api.memcache.MemcacheServiceApiHelper:104 makeAsyncCall()
  com.google.appengine.api.memcache.AsyncMemcacheServiceImpl:372 doGetAll()
  com.google.appengine.api.memcache.AsyncMemcacheServiceImpl:333 getIdentifiables()
  com.google.appengine.api.memcache.MemcacheServiceImpl:61 getIdentifiables()

我参加办法API：

  com.googlecode.objectify.cache.EntityMemcache:215 getAll()
  com.googlecode.objectify.cache.CachingAsyncDatastoreService:253 get()
  com.googlecode.objectify.cache.CachingDatastoreService:161 get()
  com.googlecode.objectify.cache.CachingDatastoreService:147 get()
  com.googlecode.objectify.cache.CachingDatastoreService:128 get()
  siena.gae.GaePersistenceManager:231 getByKey()
  siena.Model:106 getByKey()
  com.sirtrack.iridium.model.GroupEntity:147 getByKey()
  com.sirtrack.iridium.task.ProjectUpdateTask:49 doPost()

无关紧要的：

  javax.servlet.http.HttpServlet:637 service()
  javax.servlet.http.HttpServlet:717 service()
  org.mortbay.jetty.servlet.ServletHolder:511 handle()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1166 doFilter()
  com.google.appengine.tools.appstats.AppstatsFilter:141 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.SiteFilter:106 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.RewriteFilter:79 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.AuthenticationFilter:83 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.PluginCronFilter:78 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.LanguageFilter:66 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.UpdateFilter:78 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.InitFilter:80 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.vosao.filter.ContextFilter:74 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  com.google.apphosting.utils.servlet.ParseBlobUploadFilter:102 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  com.google.apphosting.runtime.jetty.SaveSessionFilter:35 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  com.google.apphosting.utils.servlet.TransactionCleanupFilter:43 doFilter()
  org.mortbay.jetty.servlet.ServletHandler$CachedChain:1157 doFilter()
  org.mortbay.jetty.servlet.ServletHandler:388 handle()
  org.mortbay.jetty.security.SecurityHandler:216 handle()
  org.mortbay.jetty.servlet.SessionHandler:182 handle()
  org.mortbay.jetty.handler.ContextHandler:765 handle()
  org.mortbay.jetty.webapp.WebAppContext:418 handle()
  com.google.apphosting.runtime.jetty.AppVersionHandlerMap:249 handle()
  org.mortbay.jetty.handler.HandlerWrapper:152 handle()
  org.mortbay.jetty.Server:326 handle()
  org.mortbay.jetty.HttpConnection:542 handleRequest()
  org.mortbay.jetty.HttpConnection$RequestHandler:923 headerComplete()
  com.google.apphosting.runtime.jetty.RpcRequestParser:76 parseAvailable()
  org.mortbay.jetty.HttpConnection:404 handle()
  com.google.apphosting.runtime.jetty.JettyServletEngineAdapter:135 serviceRequest()
  com.google.apphosting.runtime.JavaRuntime$RequestRunnable:446 run()
  com.google.tracing.TraceContext$TraceContextRunnable:449 runInContext()
  com.google.tracing.TraceContext$TraceContextRunnable$1:455 run()
  com.google.tracing.TraceContext:695 runInContext()
  com.google.tracing.TraceContext$AbstractTraceContextCallback:333 runInInheritedContextNoUnref()
  com.google.tracing.TraceContext$AbstractTraceContextCallback:325 runInInheritedContext()
  com.google.tracing.TraceContext$TraceContextRunnable:453 run()
  com.google.apphosting.runtime.ThreadGroupPool$PoolEntry:251 run()
  java.lang.Thread:679 run()

以下是可能造成的逐堆栈跟踪OutOfMemoryError异常的堆栈跟踪：

Error for /_ah/queue/projectupdate
java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Arrays.java:3057)
    at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:117)
    at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:407)
    at java.lang.StringBuffer.append(StringBuffer.java:241)
    at java.io.StringWriter.write(StringWriter.java:112)
    at java.io.PrintWriter.write(PrintWriter.java:429)
    at java.io.PrintWriter.write(PrintWriter.java:446)
    at java.io.PrintWriter.print(PrintWriter.java:576)
    at java.io.PrintWriter.println(PrintWriter.java:712)
    at java.lang.Throwable.printStackTrace(Throwable.java:529)
    at com.google.appengine.tools.appstats.Recorder.createStackTrace(Recorder.java:160)
    at com.google.appengine.tools.appstats.Recorder.initializeIntermediary(Recorder.java:271)
    at com.google.appengine.tools.appstats.Recorder.makeAsyncCall(Recorder.java:290)
    at com.googlecode.objectify.cache.TriggerFutureHook.makeAsyncCall(TriggerFutureHook.java:144)
    at com.google.apphosting.api.ApiProxy.makeAsyncCall(ApiProxy.java:184)

对于谷歌工程师，这里有一个链接到这些错误

我发现班上com.google.appengine.tools.appstats.Recorder.java称为“maxLinesOfStackTrace”无证（据我所知）参数。

在web.xml中：

<filter>
  <filter-name>appstats</filter-name>
    <filter-class>com.google.appengine.tools.appstats.AppstatsFilter</filter-class>
    <init-param>
      <param-name>maxLinesOfStackTrace</param-name>
      <param-value>16</param-value>
    </init-param>
</filter>

这似乎在本地工作，我会让你知道它是否也有助于避免的OutOfMemoryError。