From ba285fe21d5f2097d82d7a2a9de9abacc20ca05c Mon Sep 17 00:00:00 2001 From: "Charles L. Hedrick" Date: Fri, 5 Jul 2024 14:54:15 -0400 Subject: [PATCH] clarify man page --- man/man4/zfs.4 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/man/man4/zfs.4 b/man/man4/zfs.4 index cf43b0ec85b..5173ad0eacd 100644 --- a/man/man4/zfs.4 +++ b/man/man4/zfs.4 @@ -1781,7 +1781,7 @@ When readdir searches a directory, it normally prefetches metadata for all objects in the directory it checks, even if it's just looking for a single object. Setting this to a non-zero value disables that prefetching for directories -larger than that value. +with more files than that value. Disabling it for large directories can greatly lower CPU usage on NFS servers where directories have a very large number of subdirectories. A reasonable value would be 20000.