Fatal error: Allowed memory size of 41943040 bytes exhausted 에러시

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Fatal error: Allowed memory size of 41943040 bytes exhausted  이런 에러가 발생시

 

Solutions:
1) It may be possible to raise your memory limit, as in the thread that mbrsolution links to - add this to your wp-config.php file:
define('WP_MEMORY_LIMIT', '64M');

2) You could ask your web hosting company to either raise the limit, or justify it. There's really no justification for it though - as I say, they're easily in the bottom 1% there.

3) More technical is to go through your plugins one-by-one to find out which is the one using up most memory. Just because UpdraftPlus tips it over the limit doesn't indicate that it's the one using most memory - it just means that when UD gets its turn to run, it uses more memory than what's left of the 40Mb; but "what's left" at that stage could be anything. You can try disabling all your other plugins, and looking at the UpdraftPlus page, in the "expert" section (down the bottom) - there, it has a counter of memory used. Re-enable your plugins one-by-one and see which one causes the biggest increase in usage. I'd not really recommend spending huge amounts of time on that, though - it'd be more efficient to pursue 1) and 2) and if they won't raise it for you, switch to a new web hosting company.