75 lines
2.0 KiB
Bash
75 lines
2.0 KiB
Bash
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#!/bin/sh
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# Copyright (c) 2018-2021, diyIT.org
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# All rights reserved.
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#
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# BSD 2-Clause License ("Simplified BSD License" or "FreeBSD License")
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# https://diyit.org/license/
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#
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#
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MCLBYTES=2048
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MSIZE=256
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PHYSMEM=`sysctl -n hw.physmem`
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PAGE_SIZE=`sysctl -n hw.pagesize`
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VM_KMEM_SIZE=`sysctl -n vm.kmem_size`
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REALMEM=${VM_KMEM_SIZE}
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MAXMBUFMEM=`expr $REALMEM / 4 \* 3`
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MJUMPAGESIZE=$PAGE_SIZE
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MJUM9BYTES=`expr 9 \* 1024`
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MJUM16BYTES=`expr 16 \* 1024`
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#NMBCLUSTERS=`expr $MAXMBUFMEM / $MCLBYTES / 4` # higher # of jails
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NMBCLUSTERS=`expr $MAXMBUFMEM / $MCLBYTES / 3`
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NMBJUMBOP=`expr $MAXMBUFMEM / $MJUMPAGESIZE / 4`
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NMBJUMBO9=`expr $MAXMBUFMEM / $MJUM9BYTES / 6`
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NMBJUMBO16=`expr $MAXMBUFMEM / $MJUM16BYTES / 6`
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NMBUFS=`sysctl -n kern.ipc.nmbufs`
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NMMAX1=`expr $NMBCLUSTERS + $NMBJUMBOP + $NMBJUMBO9 + $NMBJUMBO16`
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NMMAX2=`expr $MAXMBUFMEM / $MSIZE / 5`
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if [ $NMMAX1 -gt $NMMAX2 ]; then
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NMBUFS=$NMMAX1
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else
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NMBUFS=$NMMAX2
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fi
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show()
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{
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echo "# `basename $0 ` suggested settings:"
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echo "kern.ipc.maxmbufmem=$MAXMBUFMEM"
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echo "kern.ipc.nmbclusters=$NMBCLUSTERS"
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echo "kern.ipc.nmbjumbop=$NMBJUMBOP"
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echo "kern.ipc.nmbjumbo9=$NMBJUMBO9"
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echo "kern.ipc.nmbjumbo16=$NMBJUMBO16"
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echo "kern.ipc.nmbufs=$NMBUFS"
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}
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compare()
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{
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echo "kern.ipc.maxmbufmem: `sysctl -n kern.ipc.maxmbufmem` (current)"
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echo " --> $MAXMBUFMEM (suggested)"
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echo "kern.ipc.nmbclusters: `sysctl -n kern.ipc.nmbclusters`"
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echo " --> $NMBCLUSTERS"
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echo "kern.ipc.nmbjumbop: `sysctl -n kern.ipc.nmbjumbop`"
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echo " --> $NMBJUMBOP"
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echo "kern.ipc.nmbjumbo9: `sysctl -n kern.ipc.nmbjumbo9`"
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echo " --> $NMBJUMBO9"
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echo "kern.ipc.nmbjumbo16: `sysctl -n kern.ipc.nmbjumbo16`"
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echo " --> $NMBJUMBO16"
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echo "kern.ipc.nmbufs: `sysctl -n kern.ipc.nmbufs`"
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echo " --> $NMBUFS"
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vmstat -z|grep -E '^ITEM|mbuf'
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netstat -m
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# vmstat -m
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}
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if [ $# -gt 0 ]; then
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if [ $1 == '-c' ]; then
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compare
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exit 0
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fi
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fi
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show
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