If I disable this plugin, all works fine.
The server can´t resolve this open connetions... too many open
connections, and the server is slow down to crash.
this issue has been solved in version 2.5.7 of cedThumbnails
Another user has reported this issue to me directly, and this bug has already been resolved in v3.3b
Hopefully read less title is now usable for you again.
Please, should you find any issue, contact me through the forum or via email.