CODEWITHSUNDEEP
linuxubuntunginxdebian
PePe
PePe

Reputation: 61

How to check if I reached a X limit in linux?

Is there a way to check if I reached a limit/kernel limit of any kind of buffer in Linux?

Like one command that tell you :

openfile limit reached
max net connection reached
net buffer full
inodes full
memory buffer full

All the other weird buffers that could be getting full in a server just like vmstat -z in FreeBSD.

P.S.: I know I can look at the logs, but if I have tons of lines it's a slow process.

Upvotes: 2

Views: 1604

Answers (1)

Barmar
Barmar

Reputation: 782166

The details depend on the specific limit. In general, you'll get an error from a system call when it tries to exceed a limit. For instance, open() will return -1 and set errno to EMFILE when if you can't open a file because of the openfile limit.

If you run out of heap memory, malloc() will return NULL to indicate that it can't allocate any more memory.

Since this is a programming site, I assumed you wanted to know how to do this in application programs. I have a feeling you're actually asking how to monitor the system in general for this, which is off-topic for SO -- sysadmin.com would be a better place.

Upvotes: 2

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