I also have the same issue as Callum, it appears to empty for extended periods of time. I use the default interval of 1.0 seconds and I check the file every 10 seconds. These machines are on EBS volumes, so perhaps the network latency on the truncate/write phase causes it to be empty for a while.
I also have the same issue as Callum, it appears to empty for extended periods of time. I use the default interval of 1.0 seconds and I check the file every 10 seconds. These machines are on EBS volumes, so perhaps the network latency on the truncate/write phase causes it to be empty for a while.