(GO) Linux open files too many open file solution

Too many open files

The reason for this is that the program opened the file/socket the number of connections exceeds the system set value.

View the maximum number of open files per user

Ulimit-a

2. [Email protected]:~$ ulimit-a
4. Core file size (blocks,-c) 0
6. Data seg Size (Kbytes,-D) Unlimited
8. Scheduling Priority (-e )
10. File size (blocks,-f) Unlimited
12. Pending signals (-i) 16382
14. Max locked Memory (Kbytes,-l )
16. Max memory Size (Kbytes,-m) unlimited
18. Open files (-N) 1024x768
20. Pipe size (bytes,-p) 8
22. POSIX message queues (bytes,-q) 819200
24. Real-time priority (-R) 0
26. Stack size (Kbytes,-s) 8192
28. CPU time (seconds,-t) unlimited
30. MAX User Processes (-u) Unlimited
32. Virtual Memory (Kbytes,-V) Unlimited
34. File locks (-X) Unlimited

where open files (-N) 1024 indicates that the maximum number of files allowed per user is 1024

View the number of files open on the current system

1. lsof | wc-l
2. watch "lsof | Wc-l "

View the number of open files for a process

1. lsof-p pid | wc-l
2. lsof-p 1234 | wc-l

Set the open files numeric method

Ulimit-n 2048

2. [email protected]:~$ ulimit-n 2048
4. [email protected]:~$ ulimit-a
6. core file size (blocks,-c) 0
8. Data seg Size (Kbytes,-D) Unlimited
10. scheduling Priority (-e )
12. file Size (blocks,-f) Unlimited
14. pending Signals (-i) 16382
16. Max locked Memory (Kbytes,-l )
18. max memory Size (Kbytes,-m) Unlimited
20. Open Files (-N) 2048
22. Pipe Size (bytes,-p) 8
24. POSIX message queues (bytes,-q) 819200
26. real-Time Priority(-R) 0
28. stack size (Kbytes,-s) 8192
30. CPU Time (seconds,-T) unlimited
32. MAX User Processes (-u) Unlimited
34. virtual Memory (Kbytes,-V) Unlimited
36. file Locks (-x) Unlimited

This allows you to set the maximum number of open files for the current user to 2048, but this setting will revert to the default value after a reboot.

Permanent Setup Method

vim /etc/security/limits.conf在最后加入* soft nofile 4096* hard nofile 4096

The top * represents all users and can set a user as needed, for example

fdipzone soft nofile 8192fdipzone hard nofile 8192

It will take effect if you cancel it after you change it.

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(GO) Linux open files too many open file solution