Author: Fabrizio Branca
See: colinmollenhour/Cm_RedisSession#91
Bots (including load balancers and reverse proxies) will create many sessions that will never be used again. Instead we're detecting them based on the user agent and will skip creating a real session.
Add this to your local.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<config>
<global>
[...]
<aoeblackholesession>
<bot_regex><![CDATA[/^elb-healthchecker/i]]></bot_regex>
</aoeblackholesession>
[...]
</global>
</config>