Problem with Spread dropping messages

Hi All

I'm new to the list, and I've got a question about message handling.

We are using spread to handle statistics from a cluster of webservers, 
aggregate them and save for processing on some back end servers.
We see that whenever there is load on the server, the spread setup seems 
to be dropping about 45% of all of the messages that have been sent from 
the webservers to the processors. The behavious is consistent, as all of 
the back-end processors see exactly the same amount of messages, and the 
messages that are seen on the processors are seen as spread between the 
webservers

Here's an example of what we're seeing - this is a load of CSV values for 
time(hours),total number of messages sent , number of messages received

0,0,0
1,0,0
2,0,0
3,0,0
4,2,2
5,3,3
6,0,0
7,30,17
8,93,50
9,421,226
10,228,124
11,372,202
12,615,334
13,661,358
14,13759,7552
15,4533,2484
16,2916,1590
17,1599,874
18,586,319
19,428,234
20,361,194
21,328,178
22,118,65
23,120,66

Spread conf file below


Spread_Segment  10.0.0.255:4803 {

#       localhost               127.0.0.1
        103-Chewer1             10.0.0.103
        113-Chewer1             10.0.0.113
        114-CDE2                10.0.0.114
        104-CDE1                10.0.0.104
}

#DebugFlags = { PRINT EXIT }
#EventPriority =  INFO
EventTimeStamp = "[%a %d %b %Y %H:%M:%S]"
RuntimeDir = /var/run/spread
DaemonUser = spread
DaemonGroup = spread
#RequiredAuthMethods = "   "
#AllowedAuthMethods = "NULL"


We are picking up messages using spreadlogd and a custom script using the 
php module, and both of these see exactly the same messages on the back 
end servers


If anyone has any pointers, it would be much appreciated


Thanks in advance


Dave


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