[20230323]ps命令查看thread.txt

[20230323]ps命令查看thread.txt --//前一段时间遇到的问题,ps -fp <pid> ,没有查询到对应进程,当时有点蒙. --//现在想想可能对应的是线程,不能通过这样的方式查询.应该加入-L参数. --//看了一些文档顺便学习相关内容. $ ps -o nlwp,pid,lwp,user,args  -u grid | awk '$1>1 { print $0}' NLWP   PID   LWP USER     COMMAND   28  8870  8870 grid     /u01/app/11.2.0/grid/bin/oraagent.bin    9 11035 11035 grid     /u01/app/11.2.0/grid/bin/gipcd.bin    4 11037 11037 grid     /u01/app/11.2.0/grid/bin/mdnsd.bin   18 11163 11163 grid     /u01/app/11.2.0/grid/bin/ocssd.bin   17 11949 11949 grid     /u01/app/11.2.0/grid/bin/evmd.bin    6 12285 12285 grid     /u01/app/11.2.0/grid/bin/gpnpd.bin   54 14183 14183 grid     /u01/app/11.2.0/grid/jdk/bin/java -server -Xcheck:jni -Xms128M -Xmx384M                           -Djava.awt.headless=true -Ddisable.checkForUpdate=true -Dstdstream.filesize=100 -Dstdstream.filenumber=10                           -DTRACING.ENABLED=false -Doracle.wlm.dbwlmlogger.logging.level=INFO -Dport.rmi=23792 -jar                           /u01/app/11.2.0/grid/oc4j/j2ee/home/oc4j.jar -config /u01/app/11.2.0/grid/oc4j/j2ee/home/OC4J_DBWLM_config/server.xml                           -out /u01/app/11.2.0/grid/oc4j/j2ee/home/log/oc4j.out -err /u01/app/11.2.0/grid/oc4j/j2ee/home/log/oc4j.err   23 15261 15261 grid     /u01/app/11.2.0/grid/bin/oraagent.bin    3 24695 24695 grid     /u01/app/11.2.0/grid/bin/tnslsnr dbrayw -inherit   16 30995 30995 grid     /u01/app/11.2.0/grid/opmn/bin/ons -d    3 31146 31146 grid     /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN2 -inherit    3 31152 31152 grid     /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN3 -inherit    3 31268 31268 grid     /u01/app/11.2.0/grid/bin/tnslsnr LISTENER -inherit --//nlwp等于对应线程的数量. $ ps -o nlwp,pid,lwp,user,args  -u oracle | awk '$1>1 { print $0}' NLWP   PID   LWP USER     COMMAND   16 15415 15415 oracle   /u01/app/11.2.0/grid/bin/oraagent.bin --//奇怪怎么两个用户oracle,grid下都有这个程序运行. --//在测试环境查看: $ ps -o nlwp,pid,lwp,args -e | awk '$1>1 { print $0}' NLWP   PID   LWP COMMAND    2  4049  4049 auditd    2  4051  4051 /sbin/audispd    5  4384  4384 automount --pid-file /var/run/autofs.pid    6  9290  9290 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x    3 44997 44997 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit --//如果要想显示全部线程,可以加入-L参数加上grep过滤就可以得到进程号. $ ps -eLf | grep "tnslsn[r]" oracle   44997     1 44997  0    3 Mar20 ?        00:10:23 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   44997     1 44998  0    3 Mar20 ?        00:00:05 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   44997     1 44999  0    3 Mar20 ?        00:00:00 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit --//第5列3表示线程数量. $ ps -eLf | grep "rsyslog[d]" root      9290     1  9290  0    6  2021 ?        00:00:00 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x root      9290     1 33554  0    6 Mar11 ?        00:00:00 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x root      9290     1 33555  0    6 Mar11 ?        00:00:01 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x root      9290     1 33556  0    6 Mar11 ?        00:00:23 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x root      9290     1 33557  0    6 Mar11 ?        00:00:00 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x root      9290     1  3272  0    6 10:35 ?        00:00:00 /sbin/rsyslogd -i /var/run/rsyslogd.pid -c3 -x --//还可以执行如下: $ ps -Lfp 44997 UID        PID  PPID   LWP  C NLWP STIME TTY          TIME CMD oracle   44997     1 44997  0    3 Mar20 ?        00:10:24 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   44997     1 44998  0    3 Mar20 ?        00:00:12 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   44997     1 44999  0    3 Mar20 ?        00:00:00 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit --//通过pstack观察. $ pstack 44997 Thread 3 (Thread 0x7f23ea92c940 (LWP 44998)): #0  0x000000379909a221 in nanosleep () from /lib64/libc.so.6 #1  0x000000379909a044 in sleep () from /lib64/libc.so.6 #2  0x00007f23ebe1398a in ons_receivethread () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libons.so #3  0x000000379a00683d in start_thread () from /lib64/libpthread.so.0 #4  0x00000037990d503d in clone () from /lib64/libc.so.6 Thread 2 (Thread 0x7f23ea8eb940 (LWP 44999)): #0  0x000000379a00b019 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0 #1  0x00007f23ebe13289 in ons_recvthread_getsocket () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libons.so #2  0x00007f23ebe14ef2 in ons_sendthread () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libons.so #3  0x000000379a00683d in start_thread () from /lib64/libpthread.so.0 #4  0x00000037990d503d in clone () from /lib64/libc.so.6 Thread 1 (Thread 0x7f23ebc096e0 (LWP 44997)): #0  0x00000037990cc116 in poll () from /lib64/libc.so.6 #1  0x00007f23ee3a62bd in ntevpque () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclntsh.so.11.1 #2  0x00007f23ee3a5f20 in ntevque () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclntsh.so.11.1 #3  0x00007f23ee3a1d71 in nsevwait () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclntsh.so.11.1 #4  0x000000000040842e in nsglma () #5  0x00000000004063cb in main () --//如果查看线程执行如下. $ pstack 44998 Thread 1 (process 44998): #0  0x000000379909a221 in nanosleep () from /lib64/libc.so.6 #1  0x000000379909a044 in sleep () from /lib64/libc.so.6 #2  0x00007f23ebe1398a in ons_receivethread () from /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libons.so #3  0x000000379a00683d in start_thread () from /lib64/libpthread.so.0 #4  0x00000037990d503d in clone () from /lib64/libc.so.6 --//缺点不知道进程号. --//另外线程有1个特点,如果你kill其中1个线程,整个进程也会kill掉,测试看看. $ kill -URG 44998 $ ps -Lfp 44997 UID        PID  PPID   LWP  C NLWP STIME TTY          TIME CMD oracle   44997     1 44997  0    3 Mar20 ?        00:10:24 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   44997     1 44998  0    3 Mar20 ?        00:00:12 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   44997     1 44999  0    3 Mar20 ?        00:00:00 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit $ kill -9 44998 $ ps -Lfp 4499 UID        PID  PPID   LWP  C NLWP STIME TTY          TIME CMD $ ps -eLf | grep "tnslsn[r]" --//没有任何输出. $ lsnrctl start .... $ ps -eLf | grep "tnslsn[r]" oracle   34299     1 34299  0    3 10:07 ?        00:00:00 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   34299     1 34300  0    3 10:07 ?        00:00:00 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit oracle   34299     1 34301  0    3 10:07 ?        00:00:00 /u01/app/oracle/product/11.2.0.4/dbhome_1/bin/tnslsnr LISTENER -inherit