> Trying to peg down why I have one server that has > btrfs-transacti pegged at 100% CPU for most of the time.
Too little information. Is IO happening at the same time? Is compression on? Deduplicated? Lots of subvolumes? SSD? What kind of workload and file size/distribution profile? Typical high CPU are extents (your defragging not necessarily worked), and 'qgroups', especially with many subvolumes. It could be the fre space cache in some rare cases. https://www.google.ca/search?num=100&safe=images&as_q=cxpu&as_epq=btrfs-transaction To this something like this happens often, but is not Btrfs-related, but triggered for example by near-memory exhaustion in the kernel memory manager. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
