[squid-users] All ntlmauthenticator processes are busy

After squid-2.5 to squid-2.6 upgrade I get everyday this
warning messages:

2006/07/12 15:05:41| WARNING: All ntlmauthenticator processes are busy.
2006/07/12 15:05:41| WARNING: up to 73 pending requests queued
2006/07/12 15:06:11| WARNING: All ntlmauthenticator processes are busy.
2006/07/12 15:06:11| WARNING: up to 94 pending requests queued
2006/07/12 15:06:11| Consider increasing the number of ntlmauthenticator
processes to at least 167 in your config file.
2006/07/12 15:06:42| WARNING: All ntlmauthenticator processes are busy.
2006/07/12 15:06:42| WARNING: up to 105 pending requests queued
2006/07/12 15:06:42| Consider increasing the number of ntlmauthenticator
processes to at least 178 in your config file.
2006/07/12 15:07:34| WARNING: All ntlmauthenticator processes are busy.
2006/07/12 15:07:34| WARNING: up to 116 pending requests queued
2006/07/12 15:07:34| Consider increasing the number of ntlmauthenticator
processes to at least 189 in your config file.
2006/07/12 15:08:04| WARNING: All ntlmauthenticator processes are busy.
2006/07/12 15:08:04| WARNING: up to 129 pending requests queued
2006/07/12 15:08:04| Consider increasing the number of ntlmauthenticator
processes to at least 202 in your config file.
2006/07/12 15:08:38| WARNING: All ntlmauthenticator processes are busy.
2006/07/12 15:08:38| WARNING: up to 135 pending requests queued
2006/07/12 15:08:38| Consider increasing the number of ntlmauthenticator
processes to at least 208 in your config file.
2006/07/12 15:09:08| WARNING: All ntlmauthenticator processes are busy.

This is the relevant squid.conf section:

auth_param ntlm program /usr/libexec/squid/ntlm_auth domain/pdc
auth_param ntlm children 50
auth_param ntlm keep_alive on

Domain controller is nt4sp6a. I have also checked the
nt event log but nothing relevant at that date/time is
logged.
Hint?

PS: Squid is compiled from sources on Slackware 10.2
Received on Wed Jul 12 2006 - 08:31:51 MDT