有哪些常用性能分析命令與工具

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常用命令

1. jstack

1. 查看：/usr/bin/jstack -l 11400

2. 導出：/usr/bin/jstack 11400 > thread.txt

3. 統計：/usr/bin/jstack -l 11400 | grep 'Apollo-RemoteConfigRepository-1' | wc -l

4. 查看cpu占用高進程：

5. 輸出：1

6. 輸出：
   "SimplePauseDetectorThread_0" #78 daemon prio=9 os_prio=0 tid=0x00007f664c07c800 nid=0x2efd sleeping[0x00007f662aa37000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
   at java.lang.Thread.sleep(Native Method)
   at java.lang.Thread.sleep(Thread.java:340)
   at java.util.concurrent.TimeUnit.sleep(TimeUnit.java:386)
   at org.LatencyUtils.TimeServices.sleepNanos(TimeServices.java:62)
   at org.LatencyUtils.SimplePauseDetector$SimplePauseDetectorThread.run(SimplePauseDetector.java:116)

   "Thread-32" #77 daemon prio=9 os_prio=0 tid=0x00007f664c074800 nid=0x2efc waiting on condition [0x00007f662aa78000]
   java.lang.Thread.State: WAITING (parking)
   at sun.misc.Unsafe.park(Native Method)
   - parking to wait for <0x00000000ed80df78> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
   at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   at org.LatencyUtils.PauseDetector$PauseDetectorThread.run(PauseDetector.java:85)

   "RxIoScheduler-1 (Evictor)" #76 daemon prio=5 os_prio=0 tid=0x00007f66a8735800 nid=0x2eed waiting on condition [0x00007f662acb9000]
   java.lang.Thread.State: TIMED_WAITING (parking)
   at sun.misc.Unsafe.park(Native Method)
   - parking to wait for <0x00000000ed51a578> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
   at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
   at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
   at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
   at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
   at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)

   "Connection evictor" #75 daemon prio=5 os_prio=0 tid=0x00007f66a8659000 nid=0x2eec waiting on condition [0x00007f662acfa000]

7. 2efd

8. 輸出：PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
   12029 root 20 0 4396512 813692 8668 S 6.2 10.2 0:05.74 java
   12527 root 20 0 4396512 813692 8668 S 6.2 10.2 0:41.19 java

9. top -H -p 11400

10. printf '%x\n' 12029

11. jstack 11400 | grep 2efd -A 30

12. jstack

    Usage:     jstack [-l] <pid>         (to connect to running process)     jstack -F [-m] [-l] <pid>         (to connect to a hung process)     jstack [-m] [-l] <executable> <core>         (to connect to a core file)     jstack [-m] [-l] [server_id@]<remote server IP or hostname>         (to connect to a remote debug server) Options:     -F  to force a thread dump. Use when jstack <pid> does not respond (process is hung)     -m  to print both java and native frames (mixed mode)     -l  long listing. Prints additional information about locks     -h or -help to print this help message

    值得關注的線程狀態有：

13. 死鎖，Deadlock（重點關注） 

14. 執行中，Runnable   

15. 等待資源，Waiting on condition（重點關注） 

16. 等待獲取監視器，Waiting on monitor entry（重點關注）

17. 暫停，Suspended

18. 對象等待中，Object.wait() 或 TIMED_WAITING

19. 阻塞，Blocked（重點關注）  

20. 停止，Parked

21. jstack能得到運行java程序的java stack和native stack的信息。可以輕松得知當前線程的運行情況。

22. 用途

23. 命令參數

24. 用法

2. jmap

1. 查看進程的內存映像信息：jmap 11400

2. 顯示Java堆詳細信息：jmap -heap 11400

3. 顯示堆中對象的統計信息：/usr/bin/jmap -histo:live 11400 | head -20

4. 生成堆轉儲快照dump文件： jmap -dump:live,format=b,file=/tmp/heap.hprof 11400

5. 輸出：Attaching to process ID 11400, please wait...
   Debugger attached successfully.
   Server compiler detected.
   JVM version is 25.121-b13
   0x0000000000400000 7K /usr/java/jdk1.8.0_121/jre/bin/java
   0x00007f664832e000 250K /usr/java/jdk1.8.0_121/jre/lib/amd64/libsunec.so
   0x00007f6684bfe000 66K /usr/lib64/libbz2.so.1.0.6
   0x00007f6684e0e000 153K /usr/lib64/liblzma.so.5.2.2
   0x00007f6685034000 88K /usr/lib64/libz.so.1.2.7
   0x00007f668524a000 97K /usr/lib64/libelf-0.166.so
   0x00007f6685462000 19K /usr/lib64/libattr.so.1.1.0
   0x00007f6685667000 86K /usr/lib64/libgcc_s-4.8.5-20150702.so.1
   0x00007f668587d000 294K /usr/lib64/libdw-0.166.so
   0x00007f6685ac5000 19K /usr/lib64/libcap.so.2.22
   0x00007f6685cca000 107K /usr/lib64/libresolv-2.17.so
   0x00007f6685ee4000 30K /usr/lib64/libnss_dns-2.17.so
   0x00007f66862eb000 90K /usr/java/jdk1.8.0_121/jre/lib/amd64/libnio.so
   0x00007f6687be0000 113K /usr/java/jdk1.8.0_121/jre/lib/amd64/libnet.so
   0x00007f6687df7000 49K /usr/java/jdk1.8.0_121/jre/lib/amd64/libmanagement.so
   0x00007f66c8000000 64K /usr/lib64/libnss_myhostname.so.2
   0x00007f66c9bc1000 121K /usr/java/jdk1.8.0_121/jre/lib/amd64/libzip.so
   0x00007f66c9ddc000 60K /usr/lib64/libnss_files-2.17.so
   0x00007f66c9fef000 48K /usr/java/jdk1.8.0_121/jre/lib/amd64/libinstrument.so
   0x00007f66ca1f9000 220K /usr/java/jdk1.8.0_121/jre/lib/amd64/libjava.so
   0x00007f66ca425000 64K /usr/java/jdk1.8.0_121/jre/lib/amd64/libverify.so
   0x00007f66ca633000 42K /usr/lib64/librt-2.17.so
   0x00007f66ca83b000 1110K /usr/lib64/libm-2.17.so
   0x00007f66cab3d000 16591K /usr/java/jdk1.8.0_121/jre/lib/amd64/server/libjvm.so
   0x00007f66cbb2f000 2105K /usr/lib64/libc-2.17.so
   0x00007f66cbefd000 18K /usr/lib64/libdl-2.17.so
   0x00007f66cc101000 99K /usr/java/jdk1.8.0_121/jre/lib/amd64/jli/libjli.so
   0x00007f66cc317000 138K /usr/lib64/libpthread-2.17.so
   0x00007f66cc533000 159K /usr/lib64/ld-2.17.so

6. 輸出：Attaching to process ID 11400, please wait...
   Debugger attached successfully.
   Server compiler detected.
   JVM version is 25.121-b13

   using parallel threads in the new generation.
   using thread-local object allocation.
   Concurrent Mark-Sweep GC

   Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize = 536870912 (512.0MB)
   NewSize = 134217728 (128.0MB)
   MaxNewSize = 134217728 (128.0MB)
   OldSize = 402653184 (384.0MB)
   NewRatio = 2
   SurvivorRatio = 8
   MetaspaceSize = 21807104 (20.796875MB)
   CompressedClassSpaceSize = 1073741824 (1024.0MB)
   MaxMetaspaceSize = 268435456 (256.0MB)
   G1HeapRegionSize = 0 (0.0MB)

   Heap Usage:
   New Generation (Eden + 1 Survivor Space):
   capacity = 120848384 (115.25MB)
   used = 66229472 (63.161346435546875MB)
   free = 54618912 (52.088653564453125MB)
   54.80377131066974% used
   Eden Space:
   capacity = 107479040 (102.5MB)
   used = 63536296 (60.592933654785156MB)
   free = 43942744 (41.907066345214844MB)
   59.11505722418064% used
   From Space:
   capacity = 13369344 (12.75MB)
   used = 2693176 (2.5684127807617188MB)
   free = 10676168 (10.181587219238281MB)
   20.144413966758577% used
   To Space:
   capacity = 13369344 (12.75MB)
   used = 0 (0.0MB)
   free = 13369344 (12.75MB)
   0.0% used
   concurrent mark-sweep generation:
   capacity = 402653184 (384.0MB)
   used = 176729160 (168.54206085205078MB)
   free = 225924024 (215.45793914794922MB)
   43.89116168022156% used

7. 輸出：

   num #instances #bytes class name
   ----------------------------------------------
   1: 273268 29359760 [C
   2: 337511 10800352 java.util.concurrent.ConcurrentHashMap$Node
   3: 217704 10449792 org.aspectj.weaver.reflect.ShadowMatchImpl
   4: 116214 10226832 java.lang.reflect.Method
   5: 217712 6966784 org.aspectj.weaver.patterns.ExposedState
   6: 69225 6647552 [Ljava.lang.Object;
   7: 271133 6507192 java.lang.String
   8: 12598 6112856 [B
   9: 1479 3026296 [Ljava.util.concurrent.ConcurrentHashMap$Node;
   10: 50114 2806384 java.util.LinkedHashMap
   11: 24799 2751976 java.lang.Class
   12: 66869 2674760 java.util.LinkedHashMap$Entry
   13: 34280 2507280 [Ljava.util.HashMap$Node;
   14: 11273 2043680 [I
   15: 78910 1932576 [Z
   16: 60015 1920480 java.util.HashMap$Node
   17: 78497 1883920 [Lorg.aspectj.weaver.ast.Var;

8. 輸出：Dumping heap to /tmp/heap.hprof ...
   Heap dump file created

9. jmap

   Usage:                    jmap [option] <pid>                        (to connect to running process)                    jmap [option] <executable <core>                        (to connect to a core file)                    jmap [option] [server_id@]<remote server IP or hostname>                        (to connect to remote debug server)                 where <option> is one of:                    <none>               to print same info as Solaris pmap                    -heap                to print java heap summary                    -histo[:live]        to print histogram of java object heap;  if   the  "live"                                         suboption is specified, only count live objects                    -clstats             to print  class   loader statistics                    -finalizerinfo       to print information on objects awaiting finalization                    -dump:<dump-options> to dump java heap in hprof binary format                                         dump-options:                                           live         dump only live objects;  if   not specified,                                                        all objects in the heap are dumped.                                           format=b     binary format                                           file=<file>  dump heap to <file>                                         Example: jmap -dump:live,format=b,file=heap.bin <pid>                    -F                   force. Use with -dump:<dump-options> <pid> or -histo                                         to force a heap dump or histogram when <pid> does not                                         respond. The  "live"   suboption is not supported                                         in  this   mode.                    -h | -help           to print  this   help message                    -J<flag>             to pass <flag> directly to the runtime system

10. 得到運行java程序的內存分配的詳細情況，可以生成 java 程序的 dump 文件, 也可以查看堆內對象示例的統計信息、查看 ClassLoader 的信息以及 finalizer 隊列。

11. 用途

12. 命令參數

13. 用法

3. jstat

1. 查看垃圾回收：jstat -gcutil 11400 1000 5

2. O：老年代使用比例

3. M：元數據區使用比例

4. CCS：壓縮使用比例

5. YGC：年輕代垃圾回收次數

6. FGCT：老年代垃圾回收消耗時間（單位：s秒）

7. GCT：垃圾回收消耗總時間（單位：s秒）

8. 輸出：
   S0 S1 E O M CCS YGC YGCT FGC FGCT GCT
   0.00 16.15 33.06 35.11 94.91 92.76 507 11.471 10 2.549 14.019
   0.00 16.15 34.19 35.11 94.91 92.76 507 11.471 10 2.549 14.019
   0.00 16.15 34.30 35.11 94.91 92.76 507 11.471 10 2.549 14.019
   0.00 16.15 34.51 35.11 94.91 92.76 507 11.471 10 2.549 14.019
   0.00 16.15 35.63 35.11 94.91 92.76 507 11.471 10 2.549 14.019

9. jstat

   Usage: jstat -help|-options                       jstat -<option> [-t] [-h<lines>] <vmid> [<interval> [<count>]]                 Definitions:                  <option>      An option reported by the -options option                  <vmid>        Virtual Machine Identifier. A vmid takes the following form:                                     <lvmid>[@<hostname>[:<port>]]                                Where <lvmid> is the local vm identifier  for   the target                                Java virtual machine, typically a process id; <hostname> is                                the name of the host running the target Java virtual machine;                                and <port> is the port number  for   the rmiregistry on the                                target host. See the jvmstat documentation  for   a more complete                                description of the Virtual Machine Identifier.                  <lines>       Number of samples between header lines.                  <interval>    Sampling interval. The following forms are allowed:                                    <n>[ "ms" | "s" ]                                Where <n> is an integer and the suffix specifies the units as                                milliseconds( "ms" ) or seconds( "s" ). The  default   units are  "ms" .                  <count>       Number of samples to take before terminating.                  -J<flag>      Pass <flag> directly to the runtime system.

10. 監視虛擬機各種運行狀態信息的命令行工具，查看堆內存各部分的使用量,以及加載類的數量

11. 用途

12. 命令參數

13. 用法

4. netstat

1. 顯示網卡列表：netstat -i

2. 顯示網絡統計：netstat -lntup

3. 統計機器中網絡連接各個狀態個數：netstat -anc | grep 9092

4. 找出程序運行的端口：netstat -ap | grep 11400

5. 輸出：
   Kernel Interface table
   Iface MTU RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
   eth0 1500 127092481 0 2325462 0 90637447 0 0 0 BMRU
   lo 65536 275564 0 0 0 275564 0 0 0 LRU

6. 輸出：
   Active Internet connections (only servers)
   Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
   tcp 0 0 0.0.0.0:9039 0.0.0.0:* LISTEN 11400/java
   tcp 0 0 0.0.0.0:9999 0.0.0.0:* LISTEN 11400/java
   tcp 0 0 0.0.0.0:9071 0.0.0.0:* LISTEN 15250/java
   tcp 0 0 0.0.0.0:9072 0.0.0.0:* LISTEN 4078/java
   tcp 0 0 0.0.0.0:9073 0.0.0.0:* LISTEN 4586/java
   tcp 0 0 0.0.0.0:50001 0.0.0.0:* LISTEN 4586/java
   tcp 0 0 0.0.0.0:9078 0.0.0.0:* LISTEN 13131/java
   tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 815/sshd
   tcp 0 0 0.0.0.0:8087 0.0.0.0:* LISTEN 28760/java
   tcp 0 0 0.0.0.0:10072 0.0.0.0:* LISTEN 4078/java
   tcp 0 0 0.0.0.0:7071 0.0.0.0:* LISTEN 1453/java
   tcp 0 0 0.0.0.0:7072 0.0.0.0:* LISTEN 32059/java
   tcp 0 0 0.0.0.0:9088 0.0.0.0:* LISTEN 24501/java
   tcp 0 0 0.0.0.0:10050 0.0.0.0:* LISTEN 795/zabbix_agentd
   tcp 0 0 0.0.0.0:16869 0.0.0.0:* LISTEN 1453/java
   tcp6 0 0 :::22 :::* LISTEN 815/sshd
   tcp6 0 0 :::10050 :::* LISTEN 795/zabbix_agentd
   udp 0 0 127.0.0.1:323 0.0.0.0:* 499/chronyd
   udp6 0 0 ::1:323 :::* 499/chronyd

7. 輸出：
   tcp 0 0 172.16.20.142:40464 172.16.20.60:9092 ESTABLISHED
   tcp 0 0 172.16.20.142:52536 172.16.20.60:9092 ESTABLISHED
   tcp 0 0 172.16.20.142:58202 172.16.20.60:9092 ESTABLISHED
   tcp 0 0 172.16.20.142:41314 172.16.20.60:9092 ESTABLISHED
   tcp 0 0 172.16.20.142:40826 172.16.20.60:9092 ESTABLISHED
   tcp 0 0 172.16.20.142:41150 172.16.20.60:9092 ESTABLISHED
   tcp 0 0 172.16.20.142:54978 172.16.20.60:9092 ESTABLISHED

8. 輸出：
   tcp 0 0 0.0.0.0:9039 0.0.0.0:* LISTEN 11400/java
   tcp 0 0 0.0.0.0:distinct 0.0.0.0:* LISTEN 11400/java
   tcp 0 0 ext-spring-md-sho:55364 work-arch-lb-1:6379 ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:54114 db-work-01:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:45768 172.16.20.1:amqp ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49960 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49932 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49954 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:47498 172.16.20.38:eforward ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49946 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49970 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:54616 st-arch-polari:webcache ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49964 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49968 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:54144 db-work-01:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:54112 db-work-01:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:54096 db-work-01:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:40826 172.16.20.:XmlIpcRegSvc ESTABLISHED 11400/java
   tcp 1 0 ext-spring-md-sho:41072 172.16.20.168:mysql CLOSE_WAIT 11400/java
   tcp 0 0 ext-spring-md-sho:49956 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:49966 172.16.20.1:ms-sql-s ESTABLISHED 11400/java
   tcp 0 0 ext-spring-md-sho:54098 db-work-01:ms-sql-s ESTABLISHED 11400/java  

9. netstat

   usage: netstat [-vWeenNcCF] [<Af>] -r         netstat {-V|--version|-h|--help}                       netstat [-vWnNcaeol] [<Socket> ...]                       netstat { [-vWeenNac] -I[<Iface>] | [-veenNac] -i | [-cnNe] -M | -s [-6tuw] } [delay]                          -r, --route              display routing table                        -I, --interfaces=<Iface> display  interface   table  for   <Iface>                        -i, --interfaces         display  interface   table                        -g, --groups             display multicast group memberships                        -s, --statistics         display networking statistics (like SNMP)                        -M, --masquerade         display masqueraded connections                          -v, --verbose            be verbose                        -W, --wide               don't truncate IP addresses                        -n, --numeric            don't resolve names                        --numeric-hosts          don't resolve host names                        --numeric-ports          don't resolve port names                        --numeric-users          don't resolve user names                        -N, --symbolic           resolve hardware names                        -e, --extend             display other/more information                        -p, --programs           display PID/Program name  for   sockets                        -o, --timers             display timers                        -c, --continuous         continuous listing                          -l, --listening          display listening server sockets                        -a, --all                display all sockets ( default : connected)                        -F, --fib                display Forwarding Information Base ( default )                        -C, --cache              display routing cache instead of FIB                        -Z, --context            display SELinux security context  for   sockets                    <Socket>={-t|--tcp} {-u|--udp} {-U|--udplite} {-S|--sctp} {-w|--raw}                           {-x|--unix} --ax25 --ipx --netrom                  <AF>=Use  '-6|-4'   or  '-A <af>'   or  '--<af>' ;  default : inet                  List of possible address families (which support routing):                    inet (DARPA Internet) inet6 (IPv6) ax25 (AMPR AX. 25 )                    netrom (AMPR NET/ROM) ipx (Novell IPX) ddp (Appletalk DDP)                    x25 (CCITT X. 25 )

10. 用于顯示與IP、TCP、UDP和ICMP協議相關的統計數據，一般用于檢驗本機各端口的網絡連接情況

11. 用途

12. 命令參數

13. 用法

常用工具

1. jconsole

1. 

2. 

3. 應用啟動參數：-Djava.rmi.server.hostname=xxxxx -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=12345

4. 點擊JDK/bin 目錄下面的jconsole.exe 即可啟動

5. 

6. 啟動使用

7. 查看內存

8. 查看線程

2. MAT

1. 通過圖型列出最大的Object

2. 

3. 列出線程的樹結構，及線程下面對象占用內存的空間

4. 

5. 自動分析內存內存泄漏的原因，可以直接定位到Class，且行數

6. 

7. 

8. 

9. 

10. Class Name ： 類名稱，java類名

11. Objects ： 類的對象的數量，這個對象被創建了多少個

12. Shallow Heap ：一個對象內存的消耗大小，不包含對其他對象的引用

13. Retained Heap ：是shallow Heap的總和，也就是該對象被GC之后所能回收到內存的總和

14. 

15. 打開dump文件

16. Histogram

17. 在某一項上右鍵打開菜單選擇 list objects ->with incoming refs 將列出該類的實例

18. 快速找出某個實例沒被釋放的原因，可以右健 Path to GC Roots–>exclue all phantom/weak/soft etc. reference :

19. Leak Suspects

20. Dominator Tree

21. Top Comsumers

jprofile

1. 啟動使用

1. 在被分析的jvm 的啟動參數增加下面內容：-agentpath:/opt/jprofiler11/bin/linux-x64/libjprofilerti.so=port=8849

2. 點擊jprofiler.exe
   執行菜單Session–Integr ation Wizards–New Server Integration
   選擇JDK
   選擇Web容器是否和Jprofiler一起運行
   

3.     輸入服務器地址，在服務器上執行jpenable

4.      /usr/local/bin/jpenable

5.      Select a JVM:
         ext-service-md-car-check-analysis.jar [10125] [1]

6.       Please select the profiling mode:
         GUI mode (attach with JProfiler GUI) [1, Enter]
         Offline mode (use config file to set profiling settings) [2]
         Please enter a profiling port
         [45763]
         8849
         You can now use the JProfiler GUI to connect on port 8849
     

7.     選擇安裝目錄

8.   

9.     端口號指定

10.   

2. 使用分析

1. 

2. 

3. 

4. 接入

5. overview:

6. cpu views：可錄像回放

show-busy-java-threads

1. 使用文檔

1. https://github.com/oldratlee/useful-scripts/blob/master/docs/java.md#-show-busy-java-threads

arthas

1. 使用文檔

1. https://arthas.aliyun.com/doc/

jvisualvm

1. 使用文檔

1. https://docs.oracle.com/javase/8/docs/technotes/guides/visualvm/index.html

JFR(飛行器)

1. 使用方法

1. 創建一個包含了你自己配置的JFR模板文件。運行jmc, 然后Window->Flight Recording Template Manage菜單。準備好檔案后，就可以導出文件，并移動到要排查問題的環境中。

2. 

3. 一分鐘后可查看記錄數據，通過這些數據，可以清楚的了解到這一分鐘時間內，整個

4. 

5. 

“有哪些常用性能分析命令與工具”的內容就介紹到這里了，感謝大家的閱讀。如果想了解更多行業相關的知識可以關注億速云網站，小編將為大家輸出更多高質量的實用文章！