error message

I get the following message periodically, and would like to know what to do, what is wrong or badly configured:

(19:51:02) jabber.cnecrs.org.br: (ejabberd@localhost) The process <0.601.2> is consuming too much memory: [{old_heap_block_size,832040},{heap_block_size,317811},{mbuf_size,0},{stack_size,168},{old_heap_size,664533},{heap_size,120083}].
[{current_function,{mnesia,do_dirty_rpc,5}},
{initial_call,{proc_lib,init_p,5}},
{message_queue_len,0},
{links,[<0.550.2>]},
{dictionary,[{'$ancestors',[ejabberd_iq_sup,ejabberd_sup,
<0.318.2>]},
{'$initial_call',{gen,init_it,
[gen_server,<0.550.2>,<0.550.2>,
gen_iq_handler,
["jabber.cnecrs.org.br",mod_roster,
process_iq],
[]]}}]},
{heap_size,317811},
{stack_size,129}]

[]s

Curt