Fatal php crash

[lodle]

Im getting this error in my forums after doing an upgrade from 1.1.7

Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 40 bytes) in /var/www/smf2/Sources/Subs-Db-mysql.php on line 655

Any solutions?

Edit: i upped the max memory for php and it got pass this error. However, im not presented by a white page trying to load the forums.
Edit2: Seems php is crashing:
[Tue Jan 13 18:55:13 2009] [notice] child pid 5703 exit signal Segmentation fault (11)
[Tue Jan 13 18:57:27 2009] [notice] child pid 5706 exit signal Segmentation fault (11)
[Tue Jan 13 18:58:55 2009] [notice] child pid 5707 exit signal Segmentation fault (11)
[Tue Jan 13 18:59:20 2009] [notice] child pid 5869 exit signal Segmentation fault (11)
[Tue Jan 13 18:59:24 2009] [notice] child pid 6030 exit signal Segmentation fault (11)

[Rumbaar]

You might want to post your server configuration and versions of software used to help for a more educated response.