From c131393f3e03d0e27c57fc1d0e1dea806c66915e Mon Sep 17 00:00:00 2001
From: xiaoz <xiaoz93@outlook.com>
Date: Tue, 22 Dec 2020 16:07:28 +0800
Subject: [PATCH] =?UTF-8?q?=E8=AE=BE=E7=BD=AE=E8=99=9A=E6=8B=9F=E5=86=85?=
 =?UTF-8?q?=E5=AD=98=E8=84=9A=E6=9C=AC?=
MIME-Version: 1.0
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---
 set_swap.sh | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 synctime.sh |  2 +-
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 set_swap.sh

diff --git a/set_swap.sh b/set_swap.sh
new file mode 100644
index 0000000..09da289
--- /dev/null
+++ b/set_swap.sh
@@ -0,0 +1,51 @@
+#!/bin/bash
+#####	设置虚拟内存				#####
+#####	update：2020/12/22			#####
+#####	author:xiaoz<xiaoz93@outlook.com>
+
+#获取物理内存
+p_mem=`free -m|grep Mem|awk '{print $2}'`
+#获取最佳虚拟内存大小
+
+#内存如果小于2g，则设置2倍
+if [ $p_mem -lt 2000 ]
+	then
+	swap_value=$p_mem*2
+elif [ $p_mem -gt 2000 ] && [ $p_mem -lt 8000 ]
+	#内存大于2G，小于8G，则设置和物理内存大小一致
+	then
+	swap_value=$p_mem
+else
+	#其他情况，比如大于8G，则设置8G内存
+	swap_value=8000
+fi
+
+
+#设置swap函数
+function set_swap(){
+	#创建swap
+	dd if=/dev/zero of=/dev/swap bs=1M count=${swap_value}
+	mkswap /dev/swap
+	swapon /dev/swap
+	#写入分区表
+	echo '/dev/swap swap                    swap    defaults        0 0' >> /etc/fstab
+}
+
+#判断当前是否开启了虚拟内存
+if [ swapon -s ]
+then
+	echo 'You have already set up swap, there is no need to repeat the settings.'
+	exit
+else
+	#设置虚拟内存
+	set_swap
+	echo '---------------------------------'
+	echo 'Swap setup complete.'
+	echo '---------------------------------'
+	swapon -s
+	echo '---------------------------------'
+	free -mt
+	echo '---------------------------------'
+fi
+
+exit
\ No newline at end of file
diff --git a/synctime.sh b/synctime.sh
index 8662c5b..bcf44ea 100644
--- a/synctime.sh
+++ b/synctime.sh
@@ -17,4 +17,4 @@ ntpd=(`which ntpdate`)
 echo "*/20 * * * * ${ntpd} pool.ntp.org > /dev/null 2>&1" >> /var/spool/cron/root
 systemctl reload crond
 
-echo "同步成功，当前时间:" date 
\ No newline at end of file
+echo "同步成功，当前时间:" date
\ No newline at end of file