PowerPC G5 missed system cache

[Дмитрий Мостовщиков]

Hi,

I am running FreeBSD-10.0-RELEASE on powerpc64 architecture with two G5
CPUs and zfs as root file system (if it has a meaning). The server is
running zabbix server with PostgreSQL database and gather metrics from
about twenty servers.
I am not familiar too much with this arch and I have faced with following
issue - I don't see system cache. Neither top utility, nor sysctl shows any
cache size. A top utility just doesn't show this option at all and sysctl
shows vm.stats.vm.v_cache_count=0. A kernel and a world were built with
default configuration because binaries weren't found at the official sites.
My knowledge in ppc are weak and probably missed cache it's a feature of
this arch. Any attempts to open web interface of zabbix are led to high
amount of reading operations. That's why I am worried about memory caching.
Can anyone give some explanation of the issue (missed cache) or a link
where a can get information for that.

Thank you in advance

-- 
С наилучшими пожеланиями,
Дмитрий Мостовщиков
Email: dmadm2008 at gmail.com
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With best regards,
Dmitriy Mostovschikov
Email: dmadm2008 at gmail dot com