這是我們以編程方式進(jìn)行的操作：http ://pastebin.com/uS5jYpd4

我們使用JMXThreadMXBean和ThreadInfo類：

ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();ThreadInfo[] threadInfos = mxBean.getThreadInfo(mxBean.getAllThreadIds(), 0);...

您也可以kill -QUIT pid在?unix下進(jìn)行操作以將堆棧轉(zhuǎn)儲(chǔ)到標(biāo)準(zhǔn)輸出中。還有jstack來轉(zhuǎn)儲(chǔ)JVM的堆棧。

我們還具有一個(gè)自動(dòng)化功能，如果應(yīng)用程序的平均負(fù)載高于某個(gè)閾值，則該功能將轉(zhuǎn)儲(chǔ)堆棧：

private long lastcpuTimeMillis;private long lastPollTimeMillis;public void checkLoadAverage() { long Now = System.currentTimeMillis(); long currentcpuMillis = getTotalcpuTimeMillis(); double loadAvg = calcLoadAveragePercentage(Now, currentcpuMillis); if (loadAvg > LOAD_AVERAGE_DUMP_THRESHOLD) {try { dumpStack('Load average percentage is ' + loadAvg);} catch (IOException e) { // Oh well, we tried} } lastcpuTimeMillis = currentcpuMillis; lastPollTimeMillis = Now;}private long getTotalcpuTimeMillis() { long total = 0; for (long id : threadMxBean.getAllThreadIds()) {long cpuTime = threadMxBean.getThreadcpuTime(id);if (cpuTime > 0) { total += cpuTime;} } // since is in nano-seconds long currentcpuMillis = total / 1000000; return currentcpuMillis;}private double calcLoadAveragePercentage(long Now, long currentcpuMillis) { long timeDiff = Now - lastPollTimeMillis; if (timeDiff == 0) {timeDiff = 1; } long cpuDiff = currentcpuMillis - lastcpuTimeMillis; double loadAvg = (double) cpuDiff / (double) timeDiff; return loadAvg;}解決方法

我想創(chuàng)建一個(gè)跟蹤內(nèi)存使用情況和cpu使用情況的線程。

如果應(yīng)用程序達(dá)到較高級(jí)別，我想生成一個(gè)堆轉(zhuǎn)儲(chǔ)或線程轉(zhuǎn)儲(chǔ)。

有沒有一種方法可以生成線程轉(zhuǎn)儲(chǔ)運(yùn)行時(shí)而無需重新啟動(dòng)？