1.3.5 zabbix_server memory leak?

[zabbix_es]

Version 1.3.5:

zabbix_server consumes 188 MBytes of virtual memory and 36 MBytes of resident RAM after one day working (top).
My Suse Linux v10.1 has only 512 MBytes of RAM.
mysqld uses about 10 % of resident RAM.
Five zabbix_servers multiplied by 36 MBytes each one are 180 MBytes of resident RAM (35 %).

I think that it is too much.
Is normal this behaviour?
May be a memory leak?
There is a way to limit the amount of memory used by zabbix?

Thank's in advance!

[NOB]

Version 1.3.5:

zabbix_server consumes 188 MBytes of virtual memory and 36 MBytes of resident RAM after one day working (top).
My Suse Linux v10.1 has only 512 MBytes of RAM.
mysqld uses about 10 % of resident RAM.
Five zabbix_servers multiplied by 36 MBytes each one are 180 MBytes of resident RAM (35 %).

I think that it is too much.
Is normal this behaviour?
[...]

I will watch my installation for that and report it here.
If you have a lot of RAM you won't notice it for some time.

Norbert.