why you should not be too quick at judging people by their GitHub activity stats ?.

jackyjoy123 — Mon, 22 Mar 2021 14:13:29 +0000

Hello,

I am a supporter of the opensource movement and I truly admire people like Eddie Jaoude, Matt Cowley and all other open-source maintainers who work hard every day so that we could have awesome software! 🙏 I strongly encourage everyone to be active in the open-source world and make meaningful contributions. If you are new to the open-source world, make sure to follow Hacktoberfest! With this post, I aim to raise awareness and show you why you should not be too quick at judging people by their GitHub activity stats as they can be easily manipulated.
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thanks
jackyjoy

mmap() failed: [12] cannot allocate memory ?.

jackyjoy123 — Fri, 22 Jan 2021 15:31:37 +0000

Hello,

Every web application consumes resources of the server. Sometimes buggy applications create resource crunch on the server and result in a memory error.

“mmap failed cannot allocate memory”.

Reason:
Mmap is a system call that maps the files or devices into server memory. The mmap() function creates new mapping upon every file request. When the memory in the server is running out, the logs will show memory error. This error usually happens due to memory shortage. However, finding the real reason for high memory usage is tedious.
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Solution:
Mmap error is a very broad and real challenge to find the cause of high memory usage. The solution depends upon the underlying reason.

Fixing this error involves the following steps;

Understanding server resource;
This includes checking the server load, server logs, finding the top resource of consuming processes. On checking server log we see the above error. After this, we further check memory usage on the server.

Identify High memory process:
To find the real user consuming most memory, we look at the results of top command, it shows;
PID SYSCPU USRCPU VGROW RGROW RDDSK WRDSK RUID EUID ST EXC THR S CPUNR CPU CMD

4220 0.95s 1.40s 0K 304K 88K 68K mysql mysql -- - 27

S 1 24% mysqld

11282 0.24s 1.34s 0K 0K

- abc - NE

0 0 E - 16%

11236 0.26s 0.92s 64288K 64224K 2196K 0K abc -- -1 R 0 12% php-cgi

11373 0.20s 0.94s 276.4M 100.2M 0K 0K abc N - - 1 R 0 11% php-cgi
This shows that top resources consuming processes were MySQL and PHP
Fixing mmap error:
Moving on, to fix this error we have two options;

Tweaking server resources
Optimizing buggy scripts

thanks
jackyjoy

DEV Community: jackyjoy123

why you should not be too quick at judging people by their GitHub activity stats ?.

mmap() failed: [12] cannot allocate memory ?.