1What: /proc/fs/nfsd/reply_cache_stats 2Date: March 2013 3KernelVersion: 3.10 4Contact: linux-nfs@vger.kernel.org 5Description: 6 Provides statistics for the NFS server duplicate reply 7 cache (DRC). The file contains one labeled field per 8 line. Each line has the form "field name:" followed by 9 whitespace and a decimal value. 10 11 Fields: 12 13 ======================= ====== ========================== 14 max entries u32 Upper bound on cache size 15 num entries u32 Current entry count 16 hash buckets u32 Number of hash buckets 17 mem usage s64 Bytes consumed by the DRC 18 cache hits s64 Requests answered from cache 19 cache misses s64 Requests not found in cache 20 not cached s64 Idempotent requests that 21 bypass the cache 22 payload misses s64 XID matched but request 23 checksum did not 24 longest chain len u32 Longest hash chain observed 25 cachesize at longest u32 Cache size when longest 26 chain was recorded 27 ======================= ====== ========================== 28 29 Counter fields (cache hits, cache misses, not cached, 30 payload misses, mem usage) are maintained with per-cpu 31 counters and may briefly show stale values under 32 concurrent load. There is no way to reset these 33 counters; consumers should compute rates by sampling 34 over time. 35 36 New fields may be appended in future kernels. Parsers 37 should match on field name, not line position. 38Users: nfs-utils (https://git.linux-nfs.org/?p=steved/nfs-utils.git) 39