| #!/bin/sh |
| |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| export PATH=$PATH:/sbin |
| |
| while true; do |
| nr_free_pages=`fgrep -A 10 Normal /proc/zoneinfo |grep nr_free_pages |awk -F ' ' '{print $2}'` |
| high=`fgrep -A 10 Normal /proc/zoneinfo |grep high |awk -F ' ' '{print $2}'` |
| |
| NOW_DATE=`date +%D` |
| NOW_TIME=`date +%T` |
| |
| if [ ${nr_free_pages} -le ${high} ]; then |
| sysctl -w vm.drop_caches=3 |
| nr_free_pages_new=`fgrep -A 10 Normal /proc/zoneinfo |grep nr_free_pages |awk -F ' ' '{print $2}'` |
| |
| printf "%s %s [CLEAN] nr_free_pages < high, clean cache. nr_free_pages=%s ====> nr_free_pages=%s\n" "${NOW_DATE}" "${NOW_TIME}" ${nr_free_pages} ${nr_free_pages_new} |
| |
| sysctl -w vm.drop_caches=1 |
| echo |
| echo |
| echo |
| else |
| printf "%s %s [NOTHING] nr_free_pages=%s high=%s\n" "${NOW_DATE}" "${NOW_TIME}" ${nr_free_pages} ${high} |
| fi |
| |
| sleep 1 |
| done |