Connection monitoring

Lord of Gore lordofgore at
Fri Oct 9 10:46:50 EDT 2009

Thank you Vincent for you suggestions.
Unfortunately the ping solution is hard to monitor and to assess.
On the other hand I already installed Nagios but it is designed to probe
from time to time the hosts not to continually ping them. I lowered the
check interval to 5 seconds but still there might be problems that
escape and given the fact that I am balancing between two databases if
only one packet doesn't arrive to the destination the db get out of sync
and I am stuck with the same problem.
I am looking for something like a mrtg graphic that will signal eventual

Thank you for your time,

Bogdan Dumitrache
LoG Soft Grup

On Fri, 2009-10-09 at 14:29 +0200, Vincent Van der Kussen wrote:

> You could run ping, or otherwise install nagios somewhere (that might be a little to much but still)
> Vincent
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> --------------------------------------------------------------------------
> -----Original Message-----
> From: redhat-list-bounces at [mailto:redhat-list-bounces at] On Behalf Of Lord of Gore
> Sent: vrijdag 9 oktober 2009 13:44
> To: redhat-list at
> Subject: Connection monitoring
> Hello list,
> I have a question regarding connection monitoring. Say I have
>             /    HOST_2
> HOST_1
>             \    HOST_3
> On HOST_1 I have a pgSQL pooler installed (pg_pool II) that does
> balancing between HOST_2 and HOST_3
> Due to some failures I want to monitor the connections between these 3
> machines and see if there are any lost packets. Which application do you
> think I shold use to check these 2 connections?
> Long shot but given the connection being PostgreSQL client (HOST_1) to
> PostgreSQL Server (HOST_2 and HOST_3) I want also to check if queries
> arrive unaltered to the servers. Any ideas?
> Note: the 3 servers are located in an inaccessible place.
> Thanks
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