What does this search error mean and how do I fix?

[kau]

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 40 bytes) in /home/httpdocs/forum/includes/db_mysql.php on line 248

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 40 bytes) in Unknown on line 0

[kau]

Now I get:


Fatal error: Allowed memory size of 10485760 bytes exhausted (tried to allocate 35 bytes) in /home/httpdocs/forum/search.php on line 970

Fatal error: Allowed memory size of 10485760 bytes exhausted (tried to allocate 40 bytes) in Unknown on line 0

[Zachery]

You need to increase your memory limit.