Thankyou Maxim, is there anyway I can make the cache manager a bit more aggressive in prune and purge? We already leave 20% of space free on the disks, but the concurrent request rate for large files can be huge and we still run in to this issue.

What are your thoughts about disabling buffering on such issues? This is not a fatal error, so we should stop buffering and switch to streaming mode and let the request succeed with a error log line in error.log.

Thanks again for your help on this.