mysqli的Codeigniter和内存分配问题

I have a HUGE DB and when I'm trying to retrive some information in order to create a PDF and I get this error:

Fatal error: Allowed memory size of 134217728 bytes exhausted
(tried to allocate 128 bytes) in 
.../system/database/drivers/mysqli/mysqli_result.php on line 167

Is there a way to increase the memory limit?

Use

ini_set('memory_limit', '128M');

you can increase the limit like below :-

ini_set("memory_limit","24M");