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Add note about join_buffer_size #434

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This commit is contained in:
Jean-Marie Renouard 2019-10-03 21:04:12 +02:00
parent 3e30c984cf
commit a421f73e26
4 changed files with 22 additions and 19 deletions
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7
build/createMassDockerImages.sh
View file

@ -3,7 +3,7 @@
input="./build/configimg.conf" input="./build/configimg.conf"
default_password="secret" default_password="secret"
eco "[client] echo "[client]
user=root user=root
password=$default_password" > $HOME/.my.cnf password=$default_password" > $HOME/.my.cnf
@ -25,7 +25,7 @@ chmod 600 $HOME/.my.cnf
5309;mariadb101;/var/lib/mariadb101;mariadb:10.1 5309;mariadb101;/var/lib/mariadb101;mariadb:10.1
5310;mariadb100;/var/lib/mariadb100;mariadb:10.0 5310;mariadb100;/var/lib/mariadb100;mariadb:10.0
5311;mariadb55;/var/lib/mariadb55;mariadb:5.5 5311;mariadb55;/var/lib/mariadb55;mariadb:5.5
" > $input " > "$input"
# #
@ -46,7 +46,8 @@ do
[ $? -eq 0 ] || continue [ $? -eq 0 ] || continue
fi fi
echo "* PULLING DOCKER IMAGE: $image_name" echo "* PULLING DOCKER IMAGE: $image_name"
docker pull $image_name docker images | grep -E " $image_name$"
[ $? -ne 0 ] && docker pull $image_name
echo "* REMOVING CONTAINER : $image_name" echo "* REMOVING CONTAINER : $image_name"
docker ps -a | grep -qE "$container_name^" docker ps -a | grep -qE "$container_name^"

25
build/createTestEnvs.sh
View file

@ -1,20 +1,23 @@
#!/bin/sh #!/bin/sh
source build/bashrc source build/bashrc
sudo dnf install -y yum-utils device-mapper-persistent-data lvm2
sudo dnf -y install dnf-plugins-core
sudo dnf config-manager \
--add-repo \
https://download.docker.com/linux/fedora/docker-ce.repo
sudo dnf -y install docker-ce docker-ce-cli containerd.io systemctl status docker &>/dev/null
dnf list docker-ce --showduplicates | sort -r if [ $? -ne 0 ];then
sudo dnf install -y yum-utils device-mapper-persistent-data lvm2
sudo dnf -y install dnf-plugins-core
sudo dnf config-manager \
--add-repo \
https://download.docker.com/linux/fedora/docker-ce.repo
sudo systemctl start docker sudo dnf -y install docker-ce docker-ce-cli containerd.io
sudo systemctl enable docker dnf list docker-ce --showduplicates | sort -r
sudo usermod -aG docker vagrant
sudo systemctl daemon-reload
sudo systemctl start docker
sudo systemctl enable docker
sudo usermod -aG docker vagrant
sudo systemctl daemon-reload
fi
sh build/createMassDockerImages.sh sh build/createMassDockerImages.sh

5
build/fetchSampleDatabases.sh
View file

@ -23,10 +23,7 @@ case "$1" in
mkdir -p ./contents mkdir -p ./contents
[ -f "contents/$(basename $(getVal "DB_$2_URL"))" ] || wget -O contents/$(basename $(getVal "DB_$2_URL")) $(getVal "DB_$2_URL") [ -f "contents/$(basename $(getVal "DB_$2_URL"))" ] || wget -O contents/$(basename $(getVal "DB_$2_URL")) $(getVal "DB_$2_URL")
if [ $? -eq 0 ];then if [ $? -eq 0 ];then
( (cd contents; unzip $( basename $(getVal "DB_$2_URL")) )
cd contents
unzip $(basename $(getVal "DB_$2_URL")))
)
fi fi
;; ;;
"clean") "clean")

4
mysqltuner.pl
View file

@ -3079,7 +3079,9 @@ sub mysql_stats {
. hr_bytes( $myvar{'join_buffer_size'} ) . hr_bytes( $myvar{'join_buffer_size'} )
. ", or always use indexes with JOINs)" ); . ", or always use indexes with JOINs)" );
push( @generalrec, push( @generalrec,
"Adjust your join queries to always utilize indexes" ); "We will suggest raising the 'join_buffer_size' until JOINs not using indexes are found.
See https://dev.mysql.com/doc/internals/en/join-buffer-size.html
(specially the conclusions at the bottom of the page).");
} }
else { else {
goodprint "No joins without indexes"; goodprint "No joins without indexes";