Update default ARC memory limits

[zfs.git] / module / zfs / arc.c

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index ff631e6..f71c248 100644 (file)
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -3559,12 +3559,12 @@ arc_init(void)
 
        /* set min cache to 1/32 of all memory, or 64MB, whichever is more */
        arc_c_min = MAX(arc_c / 4, 64<<20);
-       /* set max to 3/4 of all memory, or all but 1GB, whichever is more */
-       if (arc_c * 8 >= 1<<30)
-               arc_c_max = (arc_c * 8) - (1<<30);
+       /* set max to 1/2 of all memory, or all but 4GB, whichever is more */
+       if (arc_c * 8 >= ((uint64_t)4<<30))
+               arc_c_max = (arc_c * 8) - ((uint64_t)4<<30);
        else
                arc_c_max = arc_c_min;
-       arc_c_max = MAX(arc_c * 6, arc_c_max);
+       arc_c_max = MAX(arc_c * 4, arc_c_max);
 
        /*
         * Allow the tunables to override our calculations if they are