经常我们会发现服务器跑着跑着内存使用率达到了百分之八九十，或者有时候直接挂掉，在我们还没定位是哪块代码有问题导致内存占用很大的时候，可以先写个定时脚本，当服务器内存使用率达到一定值的时候，就重启一起服务，释放内存。下面这个定时脚本是每隔10s去判断一下机器的内存，假如内存使用率超过10%，就重启一下进程（正常情况下内存使用率是%5左右，所以就定了个10%），代码如下面蓝色部分所示。然后修改脚本权限，用于命令让它在后头不挂断运行：nohup python -u restart.py >nohup.out 2>&1 &
#! /usr/bin/env python
# -*- coding:utf-8 -*-
import os
import time
import datetime
import sched
import datetime
import psutil
#schedule_time = sched.scheduler(time.time,time.sleep)
schedule = sched.scheduler(time.time,time.sleep)
#def perform_command_time(cmd,inc):
# schedule_time.enter(inc,0,perform_command_time,(cmd,inc))
# os.system(cmd)
def perform_command(cmd,inc):
schedule.enter(inc,0,perform_command,(cmd,inc))
memory = psutil.virtual_memory()
percent = memory.percent
if percent < 10:
now = datetime.datetime.now()
print now
print percent
if percent >=10:
now = datetime.datetime.now()
print now
print percent
os.system('ps -ef | grep supervisord | grep -v grep | cut -c 9-15 | xargs kill -9')
os.system('ps -ef | grep ncq.dnsquery_monitor0_check | grep -v grep | cut -c 9-15 | xargs kill -9')
time.sleep(5)
os.system('supervisord -c /opt/trunk/conf.d/supervisord.conf')
os.system('supervisorctl -uxxx -pxxx restart all')
time.sleep(5)
#def timming_exe(cmd,inc=60):
# schedule_time.enter(inc,0,perform_command_time,(cmd,inc))
# schedule_time.run()
def restart_exe(cmd,inc=5):
schedule.enter(inc,0,perform_command,(cmd,inc))
schedule.run()
#print("show date after 10 seconds:")
#timming_exe('date',10)
print("restart celery----------->")
restart_exe('supervisorctl -uxxx -pxxx restart all',10)
#restart_exe('df -h',12)