Linux多功能诊断器-pidstat

左手的ㄟ右手 2022-07-12 04:15 186阅读 0赞

在Linux下，中间件如weblogic，tomcat会进程资源飙高，如CPU,IO,memory。你可以用top,vmstat,iostat命令分别看，也可以用一个工具搞定就是pidstat，它不仅可以监控进程的性能情况，也可以监控线程的性能情况。

**安装：**  
CentOS/Fedora/RHEL版本的linux中则使用下面的命令  
　　\# yum install sysstat  
在Debian/Ubuntu系统中可以使用下面的命令来安装  
　　\# sudo apt-get install sysstat  
  
  
当然，也可以从这里下载 https://www.icewalkers.com/Linux/Software/59040/Sysstat.html  
  
写一个demo模拟CPU飙高的情况：

public class PIDTestCPU {
        public static class CPUTask implements Runnable{
            public void run() {
                while(true){
                    double a=Math.random()*Math.random();
                }
            }
        }
        public static class IdleTask implements Runnable{
            public void run(){
                try{
                    while(true){
                        Thread.sleep(2000);
                    }
                }catch(Exception e){
    
    
                }
            }
        }
    
        public static void main(String[] args){
            new Thread(new CPUTask()).start();
            new Thread(new IdleTask()).start();
            new Thread(new IdleTask()).start();
            new Thread(new IdleTask()).start();
        }
    }

\[root@localhost ~\]\# java PIDTestCPU  
\[root@localhost ~\]\# jps  
11161 PIDTestCPU  
11239 Jps  
  
\[root@localhost ~\]\# pidstat -p  11161  1 3 -u -t  
Linux 2.6.32-431.el6.x86\_64 (localhost.localdomain)     02/09/2017      \_x86\_64\_        (1 CPU)  
  
06:11:03 PM      TGID       TID    %usr %system  %guest    %CPU   CPU  Command  
06:11:04 PM     11161         -  100.00    0.00    0.00  100.00     0  java  
06:11:04 PM         -     11161    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11162    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11163    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11164    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11165    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11166    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11167    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11168    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11169    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11170    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11171   99.00    0.00    0.00   99.00     0  |\_\_java  
06:11:04 PM         -     11172    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11173    0.00    0.00    0.00    0.00     0  |\_\_java  
06:11:04 PM         -     11174    0.00    0.00    0.00    0.00     0  |\_\_java  
  
**十进制11171转换为十六进制2ba3**  
  
2017-02-09 18:11:54  
Full thread dump Java HotSpot(TM) 64-Bit Server VM (20.45-b01 mixed mode):  
  
"DestroyJavaVM" prio=10 tid=0x00007f7078006800 nid=0x2b9a waiting on condition \[0x0000000000000000\]  
   java.lang.Thread.State: RUNNABLE  
  
"Thread-3" prio=10 tid=0x00007f70780a7800 nid=0x2ba6 waiting on condition \[0x00007f7069a64000\]  
   java.lang.Thread.State: TIMED\_WAITING (sleeping)  
        at java.lang.Thread.sleep(Native Method)  
        at PIDTestCPU$IdleTask.run(PIDTestCPU.java:13)  
        at java.lang.Thread.run(Thread.java:662)  
  
"Thread-2" prio=10 tid=0x00007f70780a5800 nid=0x2ba5 waiting on condition \[0x00007f7069b65000\]  
   java.lang.Thread.State: TIMED\_WAITING (sleeping)  
        at java.lang.Thread.sleep(Native Method)  
        at PIDTestCPU$IdleTask.run(PIDTestCPU.java:13)  
        at java.lang.Thread.run(Thread.java:662)  
  
"Thread-1" prio=10 tid=0x00007f70780a3800 nid=0x2ba4 waiting on condition \[0x00007f7069c66000\]  
   java.lang.Thread.State: TIMED\_WAITING (sleeping)  
        at java.lang.Thread.sleep(Native Method)  
        at PIDTestCPU$IdleTask.run(PIDTestCPU.java:13)  
        at java.lang.Thread.run(Thread.java:662)  
  
"Thread-0" prio=10 tid=0x00007f70780a1800 nid=0x2ba3 runnable \[0x00007f7069d67000\]  
   java.lang.Thread.State: RUNNABLE  
        at PIDTestCPU$CPUTask.run(PIDTestCPU.java:6)  
        at java.lang.Thread.run(Thread.java:662)  
  
"Low Memory Detector" daemon prio=10 tid=0x00007f7078088000 nid=0x2ba1 runnable \[0x0000000000000000\]  
   java.lang.Thread.State: RUNNABLE  
  
"C2 CompilerThread1" daemon prio=10 tid=0x00007f7078085800 nid=0x2ba0 waiting on condition \[0x0000000000000000\]  
   java.lang.Thread.State: RUNNABLE  
  
"C2 CompilerThread0" daemon prio=10 tid=0x00007f7078083000 nid=0x2b9f waiting on condition \[0x0000000000000000\]  
   java.lang.Thread.State: RUNNABLE  
  
"Signal Dispatcher" daemon prio=10 tid=0x00007f7078081000 nid=0x2b9e waiting on condition \[0x0000000000000000\]  
   java.lang.Thread.State: RUNNABLE  
  
"Finalizer" daemon prio=10 tid=0x00007f7078064000 nid=0x2b9d in Object.wait() \[0x00007f707c22b000\]  
   java.lang.Thread.State: WAITING (on object monitor)  
        at java.lang.Object.wait(Native Method)  
        - waiting on <0x00000000eb601300> (a java.lang.ref.ReferenceQueue$Lock)  
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)  
        - locked <0x00000000eb601300> (a java.lang.ref.ReferenceQueue$Lock)  
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)  
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:171)  
  
"Reference Handler" daemon prio=10 tid=0x00007f7078062000 nid=0x2b9c in Object.wait() \[0x00007f707c32c000\]  
   java.lang.Thread.State: WAITING (on object monitor)  
        at java.lang.Object.wait(Native Method)  
        - waiting on <0x00000000eb6011d8> (a java.lang.ref.Reference$Lock)  
        at java.lang.Object.wait(Object.java:485)  
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)  
        - locked <0x00000000eb6011d8> (a java.lang.ref.Reference$Lock)  
"VM Thread" prio=10 tid=0x00007f707805b800 nid=0x2b9b runnable   
"VM Periodic Task Thread" prio=10 tid=0x00007f7078093000 nid=0x2ba2 waiting on condition   
JNI global references: 888  
Heap  
 def new generation   total 4736K, used 446K \[0x00000000eb600000, 0x00000000ebb20000, 0x00000000f08a0000)  
  eden space 4224K,  10% used \[0x00000000eb600000, 0x00000000eb66fb30, 0x00000000eba20000)  
  from space 512K,   0% used \[0x00000000eba20000, 0x00000000eba20000, 0x00000000ebaa0000)  
  to   space 512K,   0% used \[0x00000000ebaa0000, 0x00000000ebaa0000, 0x00000000ebb20000)  
 tenured generation   total 10624K, used 0K \[0x00000000f08a0000, 0x00000000f1300000, 0x00000000fae00000)  
   the space 10624K,   0% used \[0x00000000f08a0000, 0x00000000f08a0000, 0x00000000f08a0200, 0x00000000f1300000)  
 compacting perm gen  total 21248K, used 2590K \[0x00000000fae00000, 0x00000000fc2c0000, 0x0000000100000000)  
   the space 21248K,  12% used \[0x00000000fae00000, 0x00000000fb0879f0, 0x00000000fb087a00, 0x00000000fc2c0000)  
  
pidstat -p  11161  1 3 -u -t  
**CPU监控：pidstat -p指定进程ID，-u表示对CPU使用率监控，参数1 3 表示每秒采集1次，共采集三次**  
%usr: 进程在用户态运行所占cpu时间比率  
%system: 进程在内核态运行所占cpu时间比率  
%CPU: 进程运行所占cpu时间比率  
CPU: 指示进程在哪个核运行  
  
pidstat -p  11161  1 3 -d -t  
**IO监控：pidstat -p指定进程ID，-d表示对磁盘IO使用率监控，参数1 3 表示每秒采集1次，共采集三次**  
kB\_rd/s: 每秒进程从磁盘读取的数据量(以kB为单位)  
kB\_wr/s: 每秒进程向磁盘写的数据量(以kB为单位)  
  
pidstat -p  11161  1 3 -r -t  
**内存监控：pidstat -p指定进程ID，-r表示对内存监控，参数1 3 表示每秒采集1次，共采集三次**  
minflt/s：进程每秒不需要从磁盘中调出内存页的总数  
majflt/s：进程每秒需要从磁盘中调出内存页的总数，一般在内存使用紧张时产生  
VSZ：进程使用虚拟内存大小，单位KB  
RSS:占用物理内存大小，单位KB  
%MEM:占用内存比率  
Average:         TGID       TID  minflt/s  majflt/s     VSZ    RSS   %MEM  Command  
Average:        11161         -      0.00      0.00 1059588  20552   2.03  java  
Average:            -     11161      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11340      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11341      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11342      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11343      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11344      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11345      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11346      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11347      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11348      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11349      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11350      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11351      0.00      0.00 1059588  20552   2.03  |\_\_java  
Average:            -     11352      0.00      0.00 1059588  20552   2.03  |\_\_java