Hi, I don't have any nfs mount on this server, and can not find the problem.. I think that the problem is the raid controller... [root@server /usr/local/etc/nagios]# dmesg | grep -i raid aac0: <IBM ServeRAID-8k> port 0x5000-0x50ff mem 0xc9e00000-0xc9ffffff,0xc7fe0000-0xc7ffffff irq 17 at device 0.0 on pci4 aac0: ServeRAID 8k-l , aac driver 2.0.0-1 aacd0: <RAID 1 (Mirror)> on aac0 but i dont have any log on this ..any suggest ? <div class="gmail_quote">On Thu, Mar 26, 2009 at 10:57 AM, Andreas Ericsson <<a href="mailto:ae@op5.se">ae@op5.se</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">Gian Paolo Buono wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi, I set this limit because my server go in hang ...and I don'have any error log in /var/log/messages ... I have think that my server there are too many processes ... I have set max_concurrent_checks=0 and my server go in hanq more often... My server is a FreeBSD 7.1-RELEASE-p2 with 950 host and 4900 service, Nagios 3.0.3 Anothre problem is that sometimes nagios don't update the status and when i try to stop nagios don't dies, i try to kill -9 the process but don't dies so I have to reboot the server. Any idea ? thank you for the support bye.. </blockquote> </div> The only way I'm aware of that a process can become unkillable is when it's in uninterruptable IO (ie, the kernel is waiting for response from a piece of hardware in such a way that everything else is more or less locked down). Are you using network-mounted drives to store any of Nagios' output files? If so, stop doing that immediately. Network filesystems perform extremely poorly with files that are being frequently updated. Apart from that, it seems as if your system isn't quite up to scratch for handling the workload you want to put on it. -- Andreas Ericsson <a href="mailto:andreas.ericsson@op5.se" target="_blank">andreas.ericsson@op5.se</a> OP5 AB <a href="http://www.op5.se" target="_blank">www.op5.se</a> Tel: +46 8-230225 Fax: +46 8-230231 Considering the successes of the wars on alcohol, poverty, drugs and terror, I think we should give some serious thought to declaring war on peace. </blockquote></div>