Linux File Identifier Restrictions

You know, in the world of Linux, everything is file. Therefore, the first step to achieve large concurrency, modify the Linux system file identifier limit number, that is, the number of file open limit

First, the total limit at the kernel level Fs.file-max

 man proc  has such a phrase   /proc/sys/fs/file-max               This  file  defines  a   system-wide  limit on the number of open               files for all processes.   (see  also setrlimit (2), which  can  be               used  by  a process to set  the per-process limit, RLIMIT_NOFILE,               on the number of files it may open.)   If you get lots  of  error               messages  about running out of file handles, try  Increasing this              value:               echo 100000 >  /proc/sys/fs/file-max

View Limit number Fs.file-max[[email protected]]# sysctl Fs.file-maxfs.file-max = 65535 Modify Limit number [email protected]]# sysctl-w Fs.file-max=6553500fs.file-max = 6553500

/PROC/SYS/FS/FILE-NR usage of FD in the recording system, number of allocated file handles

[[email protected]]# sysctl FS.FILE-NRFS.FILE-NR = 960 0 6553500

Linux File Identifier Restrictions