I am retrieving a data set with about 5000 records and I am using the EntryModel::populateModels($results) to populate the model, this is causing a 500 error. When I limit the number of records returned to 100, it is working fine but when i set the limit to null it throws the error.

There isnt any error logged in the logs, and nor can it be a timeout because it only takes about 5 secs to return the error.