View file File name : ps_mysqld_helper Content :#!/bin/bash if [ -f /etc/redhat-release ] then SYSTEMD_ENV_FILE="/etc/sysconfig/mysql" else SYSTEMD_ENV_FILE="/etc/default/mysql" fi enable_thp() { STATUS_THP_SYSTEM=0 if [ -f /sys/kernel/mm/transparent_hugepage/enabled ]; then CONTENT_TRANSHP=$(</sys/kernel/mm/transparent_hugepage/enabled) STATUS_THP_SYSTEM=$(echo $CONTENT_TRANSHP | grep -cv '\[never\]') fi if [ $STATUS_THP_SYSTEM = 1 ] then THP_CONF=$(grep -c "THP_SETTING=never" $SYSTEMD_ENV_FILE) if [ $THP_CONF = 1 ] then if test -f /sys/kernel/mm/transparent_hugepage/defrag; then echo never > /sys/kernel/mm/transparent_hugepage/defrag fi if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled fi if [ $? -ne 0 ]; then exit 1 fi fi fi } enable_jemalloc(){ JEMALLOC_LOCATION=0 for libjemall in "/usr/lib64" "/usr/lib/x86_64-linux-gnu" "/usr/lib"; do if [ -r "${libjemall}/libjemalloc.so.1" ]; then JEMALLOC_LOCATION="${libjemall}/libjemalloc.so.1" break fi done if [ "x${JEMALLOC_LOCATION}" != "x0" ]; then STATUS_JEMALLOC_CONFIG=$(grep -c -e "LD_PRELOAD=.*libjemalloc.so.1" ${SYSTEMD_ENV_FILE}) if [ $STATUS_JEMALLOC_CONFIG = 0 ]; then echo "LD_PRELOAD=${JEMALLOC_LOCATION}" >> ${SYSTEMD_ENV_FILE} fi fi } #main enable_thp enable_jemalloc