The folder ES\CachedRecord has crossed its threshold limit

The folder ES\CachedRecord has crossed its threshold limit

Hi. 
I have a question. When I install trial version of ELA and sends the logs from our devices I received this message on my mail.

The folder ES\CachedRecord has crossed its threshold limit. This is not favorable for real-time log processing and alerts. 

What does it mean? And how this error can be corrected (maybe configured more cash records)