Allowed memory size of x bytes exhausted (tried to allocate xbytes)

Fatal error: Allowed memory size of x bytes exhausted (tried to allocate xbytes)

The error normally occurs when PHP tries to process a big database records or when importing or exporting. To solve the error, there are two fixes. One is to increase PHP memory limit of the account by using a custom php.ini file. But sometimes it won't work.

If it didn't work, then you can fix the error by increasing the memory of the particular PHP script (displayed in error message) by adding an additional line at the top of the script:

Find Linux OS is 32 or 64bit.

There are several situations where you need to confirm whether your Linux OS installed  is 32bit or 64bit. People normally use uname -a to find it. But the following command will tell you exactly the machine   architecture.

getconf LONG_BIT

getconf utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2, Utility  Syntax.

eg:

[root@localhost ~]# getconf LONG_BIT
32
[root@localhost ~]#

My machine is 32bit.