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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have been running ISC dhcp version 3.1.2 in failover mode
including a patch one-lease-per-mac on </span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Linux RedHat Server 5.1.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The configuration file has only 3 pools configured to it
with 20000 ips each (total pool size of 60000). Lease time is 10 hours.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>A performance test was done for the failover pair, where the
scenario was that both servers in failover pair are up and running normally, but
the 60000 client requests are sent only to the Primary server (simulating possible
router malfunction)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The Primary server hands out 30000 leases in the first hour,
But after an hour the %memory consumption of the dhcpd process significantly increases
from about 8% to 90% and finally leads to the dhcp server to crash with the
following messages at the end of the 2<sup>nd</sup> hour.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'>no memory for
option buffer.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'>no memory for
option buffer.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'>no memory for
option buffer.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'>dhcp_failover_put_message:
something went wrong.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'>dhcp_failover_send_connect:
out of memory<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'>Segmentation
fault<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:64.9pt;text-autospace:none'><font size=2
face=Courier><span style='font-size:10.0pt;font-family:Courier'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>The same thing happens if the
secondary is the only server receiving requests.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have searched the mailing lists and found people have
faced similar issues but have not got a solution.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Does any body have any idea why this happens?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Any help will be appreciated.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks in advance<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Meera.<o:p></o:p></span></font></p>
</div>
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