The reson for this message is that some one from the network is sending multiple search quires to the google often done through the automated tools or the some virus or malware is sending it.It has nothing to do with the number of users.
Following suggestion can help you resolve the issue (try visiting the following link) :
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...