Linux Lightweight Process LWP

Haven't updated the blog for a long time, say the system environment:

Uname-alinux REDHAT6 2.6.32-279.el6.x86_64 #1 SMP Wed June 18:24:36 EDT x86_64 x86_64 x86_64 gnu/linux

Tomcat Java Process number 1243

[[Email protected] proc]# ps -el|head -1  pid   lwp tty           time cmd[[email protected] proc]#  ps -eL|grep java 1243  1243 pts/0    00:00:00  java 1243  1244 pts/0    00:00:01 java 1243  1245  pts/0    00:00:32 java 1243  1246 pts/0     00:00:00 java 1243  1247 pts/0    00:00:00 java  1243  1248 pts/0    00:00:00 java 1243  1249 pts/0     00:00:03 java 1243  1250 pts/0     00:00:04 java 1243  1251 pts/0    00:00:00 java 1243   1252 pts/0    00:00:08 java 1243  1253 pts/0    00:00:00  java 1243  1259 pts/0    00:00:00 java

Cd/proc

[[email protected] proc]# ls -d [0-9]* 1     1058   11    1158  12    1212  1395  16   2   23   25   27   293  31   35  381  40  44  52   692  729   733  910    1068  1111  1166  1207   1243  14    17  20  24   250   28   294  32  36  383  41  49   53   693  730  7721014  1069  1128   1174  1209  1265  1462  18  21  242   251  29   3    33  37  39   42  5    6    7    731  81021  1097  1136   1189  1210  13    15    19   22  243  26   292  30   34  38   4    43  50  687  728  732   83 we will find that there is no 1244,1245 such as PID, don't worry,[[email protected] proc]# ls 1244   attr        clear_refs       cwd       fdinfo    maps       mountstats   oom_score      root       smaps   statusautogroup  cmdline          environ  io         mem        net          oom_score_adj  sched      stack   syscallauxv       coredump_filter  exe       limits    mountinfo  numa_maps   pagemap         schedstat  stat   taskcgroup      cpuset           fd        loginuid  mounts     oom_adj      personality    sessionid  statm  wchan[[email  protected] proc]# ll  1244/exelrwxrwxrwx 1 root root 0 11 Month   6 11:27 1244/exe - > /usr/local/jdk1.6.0_45/bin/java

See, although not see 1244, but the content is actually 1243 content, essentially 1244 is the LWP process number.

At the same time, we can also understand that the maximum number of processes under Linux limit also play a role in threading. If you want to increase the maximum number of threads, increase the maximum number of processes.

[[email protected] proc]# cat/etc/security/limits.d/90-nproc.conf # Default limit for number of user ' s processes to Preve nt# accidental fork bombs.# See Rhbz #432903 for reasoning.* soft nproc 1024

This article is from "The gentleman is learned and the Japanese participate in the province to oneself." blog, be sure to keep this source http://linuxgp.blog.51cto.com/1708668/1572996

Linux Lightweight Process LWP