JAVA[资源使用情况监听]CPU、JVM、物理内存、线程数_焰火暖浮生的博客-CSDN博客
在开发kafka监听服务时，遇到了内存使用不断上涨的问题，使用一些方式感知CPU、JVM、物理内存、线程数等的使用情况，存记以备使用。
1.引入依赖
<dependency> <groupId>com.github.oshi</groupId> <artifactId>oshi-core</artifactId> <version>3.12.2</version> </dependency> <dependency> <groupId>net.java.dev.jna</groupId> <artifactId>jna</artifactId> <version>5.2.0</version> </dependency> <dependency> <groupId>net.java.dev.jna</groupId> <artifactId>jna-platform</artifactId> <version>5.2.0</version> </dependency>2.code
package com.iflytek.kafkamonitor.systemmonitor; import com.sun.management.OperatingSystemMXBean;import org.springframework.stereotype.Component;import oshi.SystemInfo;import oshi.hardware.CentralProcessor; import javax.annotation.PostConstruct;import java.io.File;import java.lang.management.ManagementFactory;import java.lang.management.MemoryMXBean;import java.lang.management.MemoryUsage;import java.text.DecimalFormat;import java.text.SimpleDateFormat;import java.util.Date;import java.util.concurrent.Executors;import java.util.concurrent.TimeUnit; /** * @author yangchao * @date 2022.1.6 */@Componentpublic class SystemMonitor { @PostConstruct public void init() { Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(() -> { try { SystemInfo systemInfo = new SystemInfo(); OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean(); MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean(); //椎内存使用情况 MemoryUsage memoryUsage = memoryMXBean.getHeapMemoryUsage(); //初始的总内存 long initTotalMemorySize = memoryUsage.getInit(); //最大可用内存 long maxMemorySize = memoryUsage.getMax(); //已使用的内存 long usedMemorySize = memoryUsage.getUsed(); // 操作系统 String osName = System.getProperty("os.name"); // 总的物理内存 String totalMemorySize = new DecimalFormat("#.##").format(osmxb.getTotalPhysicalMemorySize() / 1024.0 / 1024 / 1024) + "G"; // 剩余的物理内存 String freePhysicalMemorySize = new DecimalFormat("#.##").format(osmxb.getFreePhysicalMemorySize() / 1024.0 / 1024 / 1024) + "G"; // 已使用的物理内存 String usedMemory = new DecimalFormat("#.##").format((osmxb.getTotalPhysicalMemorySize() - osmxb.getFreePhysicalMemorySize()) / 1024.0 / 1024 / 1024) + "G"; // 获得线程总数 ThreadGroup parentThread; for (parentThread = Thread.currentThread().getThreadGroup(); parentThread.getParent() != null; parentThread = parentThread.getParent()) { } int totalThread = parentThread.activeCount(); // 磁盘使用情况 File[] files = File.listRoots(); for (File file : files) { String total = new DecimalFormat("#.#").format(file.getTotalSpace() * 1.0 / 1024 / 1024 / 1024) + "G"; String free = new DecimalFormat("#.#").format(file.getFreeSpace() * 1.0 / 1024 / 1024 / 1024) + "G"; String un = new DecimalFormat("#.#").format(file.getUsableSpace() * 1.0 / 1024 / 1024 / 1024) + "G"; String path = file.getPath(); System.err.println(path + "总:" + total + ",可用空间:" + un + ",空闲空间:" + free); System.err.println("============================================="); } System.err.println("操作系统:" + osName); System.err.println("程序启动时间:" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(ManagementFactory.getRuntimeMXBean().getStartTime()))); System.err.println("pid:" + System.getProperty("PID")); System.err.println("cpu核数:" + Runtime.getRuntime().availableProcessors()); printlnCpuInfo(systemInfo); System.err.println("JAVA_HOME:" + System.getProperty("java.home")); System.err.println("JAVA_VERSION:" + System.getProperty("java.version")); System.err.println("USER_HOME:" + System.getProperty("user.home")); System.err.println("USER_NAME:" + System.getProperty("user.name")); System.err.println("初始的总内存(JVM):" + new DecimalFormat("#.#").format(initTotalMemorySize * 1.0 / 1024 / 1024) + "M"); System.err.println("最大可用内存(JVM):" + new DecimalFormat("#.#").format(maxMemorySize * 1.0 / 1024 / 1024) + "M"); System.err.println("已使用的内存(JVM):" + new DecimalFormat("#.#").format(usedMemorySize * 1.0 / 1024 / 1024) + "M"); System.err.println("总的物理内存:" + totalMemorySize); System.err.println("总的物理内存:" + new DecimalFormat("#.##").format(systemInfo.getHardware().getMemory().getTotal() * 1.0 / 1024 / 1024 / 1024) + "M"); System.err.println("剩余的物理内存:" + freePhysicalMemorySize); System.err.println("剩余的物理内存:" + new DecimalFormat("#.##").format(systemInfo.getHardware().getMemory().getAvailable() * 1.0 / 1024 / 1024 / 1024) + "M"); System.err.println("已使用的物理内存:" + usedMemory); System.err.println("已使用的物理内存:" + new DecimalFormat("#.##").format((systemInfo.getHardware().getMemory().getTotal() - systemInfo.getHardware().getMemory().getAvailable()) * 1.0 / 1024 / 1024 / 1024) + "M"); System.err.println("总线程数:" + totalThread); System.err.println("==========================="); } catch (Exception e) { e.printStackTrace(); } }, 0, 60, TimeUnit.SECONDS); } /** * 打印 CPU 信息 * * @param systemInfo */ public void printlnCpuInfo(SystemInfo systemInfo) throws InterruptedException { CentralProcessor processor = systemInfo.getHardware().getProcessor(); long[] prevTicks = processor.getSystemCpuLoadTicks(); // 睡眠1s TimeUnit.SECONDS.sleep(1); long[] ticks = processor.getSystemCpuLoadTicks(); long nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()]; long irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()]; long softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()]; long steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()]; long cSys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()]; long user = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()]; long iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()]; long idle = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()]; long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal; System.err.println("cpu核数:" + processor.getLogicalProcessorCount()); System.err.println("cpu系统使用率:" + new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu)); System.err.println("cpu用户使用率:" + new DecimalFormat("#.##%").format(user * 1.0 / totalCpu)); System.err.println("cpu当前等待率:" + new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu)); System.err.println("cpu当前空闲率:" + new DecimalFormat("#.##%").format(idle * 1.0 / totalCpu)); System.err.format("CPU load: %.1f%% (counting ticks)%n", processor.getSystemCpuLoadBetweenTicks() * 100); System.err.format("CPU load: %.1f%% (OS MXBean)%n", processor.getSystemCpuLoad() * 100); 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创建于: 2023-07-11 18:06:50
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