Tuning-primer.sh
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This is a shell script I found on the net. It uses MySQL internals to make recommendations about tuning your MySQL installation by adjusting /etc/my.cnf - the mysql startup file.
Run it at your own risk as root. It worked for me but otherwise comes with no guarantees except the usual one - if it breaks anything of yours, you still own all the pieces.
(Note: The script has been extended. Download from mysqltuner.com, link is on the right-hand side. --Max 18:03, 25 February 2010 (UTC))
#!/usr/bin/env bash
#########################################################################
# #
# MySQL performance tuning primer script #
# Writen by: Matthew Montgomery <mmontgom@rackspace.com> #
# Inspired by: MySQLARd (http://gert.sos.be/demo/mysqlar/) #
# Version 1.2-r6 #
# Licenced under GPLv2 #
# #
#########################################################################
#########################################################################
# #
# Set this socket variable if you have multiple instances running or if #
# we are unable to find your socket otherwise #
# #
#########################################################################
socket=
function cecho ()
## -- Function to easliy print colored text -- ##
# Color-echo.
# Argument $1 = message
# Argument $2 = color
{
export black='\E[0m\c'
export boldblack='\E[1;0m\c'
export red='\E[31m\c'
export boldred='\E[1;31m\c'
export green='\E[32m\c'
export boldgreen='\E[1;32m\c'
export yellow='\E[33m\c'
export boldyellow='\E[1;33m\c'
export blue='\E[34m\c'
export boldblue='\E[1;34m\c'
export magenta='\E[35m\c'
export boldmagenta='\E[1;35m\c'
export cyan='\E[36m\c'
export boldcyan='\E[1;36m\c'
export white='\E[37m\c'
export boldwhite='\E[1;37m\c'
local default_msg="No message passed."
# Doesn't really need to be a local variable.
message=${1:-$default_msg} # Defaults to default message.
color=${2:-$black} # Defaults to black, if not specified.
echo -e "$color"
echo -e "$message"
tput sgr0 # Reset to normal.
echo -e "$black"
return
}
function print_banner () {
## -- Banner -- ##
cecho "\t\c " $black
cecho "-- MYSQL PERFORMANCE TUNING PRIMER --" $boldblue
cecho "\t - By: Matthew Montgomery -" $black
}
## -- Find the location of the mysql.sock file -- ##
function check_for_socket () {
if [ -z "$socket" ] ; then
if [ -S /var/lib/mysql/mysql.sock ] ; then
socket=/var/lib/mysql/mysql.sock
elif [ -S /tmp/mysql.sock ] ; then
socket=/tmp/mysql.sock
else
ps_socket=`netstat -ln | egrep "mysql(d)?\.sock" | awk '{ print $9 }'`
if [ "$ps_socket" ] ; then
socket=$ps_socket
fi
fi
fi
if [ -S "$socket" ] ; then
echo UP > /dev/null
else
cecho "No valid socket file "$socket" found!" $boldred
cecho "mysqld is not running or it is installed in a custom location" $red
cecho "Please set the $socket variable at the top of this script."
exit 1
fi
}
function check_for_plesk_passwords () {
## -- Check for the existance of plesk and login using its credentials -- ##
if [ -f /etc/psa/.psa.shadow ] ; then
mysql="mysql -S $socket -u admin -p`cat /etc/psa/.psa.shadow`"
mysqladmin="mysqladmin -S $socket -u admin -p`cat /etc/psa/.psa.shadow`"
else
mysql="mysql -S $socket"
mysqladmin="mysqladmin -S $socket"
fi
}
function check_mysql_login () {
## -- Test for running mysql -- ##
is_up=`$mysqladmin ping 2>&1`
if [ "$is_up" = "mysqld is alive" ] ; then
echo UP > /dev/null
elif [ "$is_up" != "mysqld is alive" ] ; then
cecho "\n\c"
cecho "- INITIAL LOGIN ATTEMPT FAILED -\n" $boldred
if [ -z $prompted ] ; then
find_webmin_passwords
else
return 1
fi
else
cecho "Unknow exit status" $red
exit -1
fi
}
function final_login_attempt () {
is_up=`$mysqladmin ping 2>&1`
if [ "$is_up" = "mysqld is alive" ] ; then
echo UP > /dev/null
elif [ "$is_up" != "mysqld is alive" ] ; then
cecho "- FINAL LOGIN ATTEMPT FAILED -\n" $boldred
exit 1
fi
}
function second_login_failed () {
## -- create a ~/.my.cnf and exit when all else fails -- ##
cecho "- RETRY LOGIN ATTEMPT FAILED -\n" $boldred
cecho "Could not auto detect login info!\n"
read -p "Do you have your login handy ? [y/N] : "
case $REPLY in
yes | y | Y | YES)
answer1='yes'
read -p "User: " user
read -rsp "Password: " pass
export mysql="$mysql -u$user -p$pass"
export mysqladmin="$mysqladmin -u$user -p$pass"
;;
*)
cecho "\nPlease create a valid login to MySQL"
cecho "Or, set correct values for 'user=' and 'password=' in ~/.my.cnf"
;;
esac
cecho "\n\c"
read -p "Would you like me to create a ~/.my.cnf file for you? [y/N] : "
case $REPLY in
yes | y | Y | YES)
answer2='yes'
if [ ! -f ~/.my.cnf ] ; then
umask 077
echo -e "[client]\nuser=$user\npassword=$pass" > ~/.my.cnf
if [ "$answer1" != 'yes' ] ; then
exit 1
else
final_login_attempt
return 0
fi
else
cecho "\n~/.my.cnf already exists!\n" $boldred
read -p "Replace ? [y/N] : "
if [ "$REPLY" = 'y' ] || [ "$REPLY = 'Y' " ] ; then
echo -e "[client]\nuser=$user\npassword=$pass" > ~/.my.cnf
if [ "$answer1" != 'yes' ] ; then
exit 1
else
final_login_attempt
return 0
fi
else
cecho "Please set the 'user=' and 'password=' values in ~/.my.cnf"
exit 1
fi
fi
;;
*)
if [ "$answer1" != 'yes' ] ; then
exit 1
else
final_login_attempt
return 0
fi
;;
esac
}
function find_webmin_passwords () {
## -- populate the .my.cnf file using values harvested from Webmin -- ##
cecho "Testing Stored for passwords:\c"
if [ -f /etc/webmin/mysql/config ] ; then
user=`grep ^login= /etc/webmin/mysql/config | cut -d "=" -f 2`
pass=`grep ^pass= /etc/webmin/mysql/config | cut -d "=" -f 2`
if [ $user ] && [ $pass ] && [ ! -f ~/.my.cnf ] ; then
cecho "Setting login info as User: $user Password: $pass"
touch ~/.my.cnf
chmod 600 ~/.my.cnf
echo -e "[client]\nuser=$user\npassword=$pass" > ~/.my.cnf
cecho "Retrying login"
is_up=`$mysqladmin ping 2>&1`
if [ "$is_up" = "mysqld is alive" ] ; then
echo UP > /dev/null
else
second_login_failed
fi
echo
else
second_login_failed
echo
fi
else
cecho " None Found\n" $boldred
second_login_failed
fi
}
#########################################################################
# #
# Function to pull MySQL status variable #
# #
# Call using : #
# mysql_status \'Mysql_status_variable\' bash_dest_variable #
# #
#########################################################################
function mysql_status () {
local status=`$mysql -Bse "show /*!50000 global */ status like $1" |
awk '{ print $2 }'`
export "$2"=$status
}
#########################################################################
# #
# Function to pull MySQL server runtime variable #
# #
# Call using : #
# mysql_variable \'Mysql_server_variable\' bash_dest_variable #
# - OR - #
# mysql_variableTSV \'Mysql_server_variable\' bash_dest_variable #
# #
#########################################################################
function mysql_variable () {
local variable=`$mysql -e "show /*!500000 global */ variables like $1" |
grep -v Variable_name | awk '{ print $2 }'`
export "$2"=$variable
}
function mysql_variableTSV () {
local variable=`$mysql -e "show variables like $1" |
grep -v Variable_name | awk -F \t '{ print $2 }'`
export "$2"=$variable
}
function divide () {
# -- Divide two intigers -- #
usage="$0 dividend divisor '$variable' scale"
if [ $1 -ge 1 ] ; then
dividend=$1
else
cecho "Invalid Dividend" $red
echo $usage
exit 1
fi
if [ $2 -ge 1 ] ; then
divisor=$2
else
cecho "Invalid Divisor" $red
echo $usage
exit 1
fi
if [ ! -n $3 ] ; then
cecho "Invalid variable name" $red
echo $usage
exit 1
fi
if [ -z $4 ] ; then
scale=2
elif [ $4 -ge 0 ] ; then
scale=$4
else
cecho "Invalid scale" $red
echo $usage
exit 1
fi
export $3=$(echo "scale=$scale; $dividend / $divisor" | bc -l)
}
function human_readable () {
#########################################################################
# #
# Convert a value in to human readable size and populate a variable #
# with the result. #
# #
# Call using: #
# human_readable $value 'variable name' #
# #
#########################################################################
## value=$1
## variable=$2
scale=$3
if [ $1 -gt 1048576 ] ; then
if [ -z $3 ] ; then
scale=0
fi
divide $1 1048576 "$2" $scale
unit="M"
elif [ $1 -gt 1024 ] ; then
if [ -z $3 ] ; then
scale=2
fi
divide $1 1024 "$2" $scale
unit="K"
else
export "$2"=$1
unit="bytes"
fi
# let "$2"=$HR
}
function human_readable_time () {
########################################################################
# #
# Function to produce human readable time #
# #
########################################################################
usage="$0 seconds 'variable'"
if [ -z $1 ] || [ -z $2 ] ; then
cecho $usage $red
exit 1
fi
days=$(echo "scale=0 ; $1 / 86400" | bc -l)
remainder=$(echo "scale=0 ; $1 % 86400" | bc -l)
hours=$(echo "scale=0 ; $remainder / 3600" | bc -l)
remainder=$(echo "scale=0 ; $remainder % 3600" | bc -l)
minutes=$(echo "scale=0 ; $remainder / 60" | bc -l)
seconds=$(echo "scale=0 ; $remainder % 60" | bc -l)
export $2="$days days $hours hrs $minutes min $seconds sec"
}
function check_mysql_version () {
## -- Print Version Info -- ##
mysql_variable \'version\' mysql_version
mysql_variable \'version_compile_machine\' mysql_version_compile_machine
cecho "MySQL Version $mysql_version $mysql_version_compile_machine"
}
function post_uptime_warning () {
#########################################################################
# #
# Present a reminder that mysql must run for a couple of days to #
# build up good numbers in server status variables before these tuning #
# suggestions should be used. #
# #
#########################################################################
mysql_status \'Uptime\' uptime
mysql_status \'Threads_connected\' threads
let queries_per_sec=$questions/$uptime
human_readable_time $uptime uptimeHR
cecho "Uptime = $uptimeHR"
cecho "Avg. qps = $queries_per_sec"
cecho "Total Questions = $questions"
cecho "Threads Connected = $threads"
echo
if [ $uptime -gt 172800 ] ; then
cecho "Server has been running for over 48hrs."
cecho "It should be safe to follow these recommendations"
else
cecho "Warning: \c" $boldred
cecho "Server has not been running for at least 48hrs." $boldred
cecho "It may not be safe to use these recommendations" $boldred
fi
echo ""
cecho "To find out more information on how each of these" $red
cecho "runtime variables effects performance visit:" $red
if [ $major_version == '3.23' ] || [ $major_version == '4.0' ] || [ $major_version == '4.1' ]; then
cecho "http://dev.mysql.com/doc/refman/4.1/en/server-system-variables.html" $boldblue
elif [ $major_version == '5.0' ] || [ $major_version == '5.1' ] ; then
cecho "http://dev.mysql.com/doc/refman/$major_version/en/server-system-variables.html" $boldblue
else
echo "UNSUPPORTED MYSQL VERSION"
exit 1
fi
}
function check_slow_queries () {
## -- Slow Queries -- ##
cecho "SLOW QUERIES" $boldblue
mysql_status \'Slow_queries\' slow_queries
mysql_variable \'long_query_time\' long_query_time
mysql_variable \'log%queries\' log_slow_queries
prefered_query_time=5
if [ -e /etc/my.cnf ] ; then
if [ -z $log_slow_queries ] ; then
log_slow_queries=`grep log-slow-queries /etc/my.cnf`
fi
fi
cecho "Current long_query_time = $long_query_time sec."
cecho "You have \c"
cecho "$slow_queries \c" $boldred
cecho "out of \c"
cecho "$questions \c" $boldred
cecho "that take longer than $long_query_time sec. to complete"
if [ "$log_slow_queries" = 'ON' ] ; then
cecho "The slow query log is enabled."
elif [ "$log_slow_queries" = 'OFF' ] ; then
cecho "The slow query log is \c"
cecho "NOT \c" $boldred
cecho "enabled."
elif [ -z $log_slow_queries ] ; then
cecho "The slow query log is \c"
cecho "NOT \c" $boldred
cecho "enabled."
else
cecho "Error: $log_slow_queries" $boldred
fi
if [ $long_query_time -gt $prefered_query_time ] ; then
cecho "Your long_query_time may be too high, I typically set this under $prefered_query_time sec." $red
else
cecho "Your long_query_time seems to be fine" $green
fi
}
function check_used_connections () {
## -- Used Connections -- ##
mysql_variable \'max_connections\' max_connections
mysql_status \'Max_used_connections\' max_used_connections
mysql_status \'Threads_connected\' threads_connected
let connections_ratio=$max_used_connections*100/$max_connections
cecho "MAX CONNECTIONS" $boldblue
cecho "Current max_connections = $max_connections"
cecho "Current threads_connected = $threads_connected"
cecho "Historic max_used_connections = $max_used_connections"
cecho "The number of used connections is \c"
if [ $connections_ratio -ge 85 ] ; then
txt_color=$red
else
txt_color=$green
fi
# cecho "$max_used_connections \c" $txt_color
# cecho "which is \c"
cecho "$connections_ratio% \c" $txt_color
cecho "of the configured maximum."
unset txt_color
if [ $connections_ratio -ge 85 ] ; then
cecho "You should raise max_connections" $red
else
cecho "Your max_connections variable seems to be fine." $green
fi
}
function check_threads() {
## -- Worker Threads -- ##
cecho "WORKER THREADS" $boldblue
mysql_status \'Threads_created\' threads_created1
sleep 1
mysql_status \'Threads_created\' threads_created2
mysql_status \'Threads_cached\' threads_cached
mysql_status \'Uptime\' uptime
mysql_variable \'thread_cache_size\' thread_cache_size
let historic_threads_per_sec=$threads_created1/$uptime
let current_threads_per_sec=$threads_created2-$threads_created1;
cecho "Current thread_cache_size = $thread_cache_size"
cecho "Current threads_cached = $threads_cached"
cecho "Current threads_per_sec = $current_threads_per_sec"
cecho "Historic threads_per_sec = $historic_threads_per_sec"
if [ $historic_threads_per_sec -ge 2 ] && [ $threads_cached -le 1 ] ; then
cecho "Threads created per/sec are overrunning threads cached" $red
cecho "You should raise thread_cache_size" $red
elif [ $current_threads_per_sec -ge 2 ] ; then
cecho "Threads created per/sec are overrunning threads cached" $red
cecho "You should raise thread_cache_size" $red
else
cecho "Your thread_cache_size is fine" $green
fi
}
function check_key_buffer_size () {
## -- Key buffer Size -- ##
cecho "KEY BUFFER" $boldblue
mysql_status \'Key_read_requests\' key_read_requests
mysql_status \'Key_reads\' key_reads
mysql_status \'Key_blocks_used\' key_blocks_used
mysql_status \'Key_blocks_unused\' key_blocks_unused
mysql_variable \'key_buffer_size\' key_buffer_size
mysql_variable \'datadir\' datadir
myisam_indexes=`$mysql -Bse "/*!50000 SELECT SUM(INDEX_LENGTH) from information_schema.TABLES where ENGINE='MyISAM'
*/"`
OS=$(uname)
if [ "$OS" == 'Darwin' ] || [ "$OS" == 'FreeBSD' ] || [ "$OS" == 'OpenBSD' ] ; then
duflags=
else
duflags='-b'
fi
if [ -z "$myisam_indexes" ] ; then
myisam_indexes=`find $datadir -name '*.MYI' -exec du $duflags '{}' \; | awk '{ s += $1 } END {
printf("%i\n", s )}'`
fi
if [ $key_reads -eq 0 ] ; then
cecho "No key reads?!" $boldred
cecho "Seriously look into using some indexes" $red
key_cache_miss_rate=0
key_buffer_ratio=0
key_buffer_ratioRND=0
else
let key_cache_miss_rate=$key_read_requests/$key_reads
if [ ! -z $key_blocks_unused ] ; then
let key_blocks_total=$key_blocks_used+$key_blocks_unused
divide $key_blocks_used $key_blocks_total key_buffer_fill 2
key_buffer_ratio=$(echo "$key_buffer_fill * 100" | bc -l)
key_buffer_ratioRND=$(echo "scale=0; $key_buffer_ratio / 1" | bc -l)
else
key_buffer_ratio='Unknown'
key_buffer_ratioRND=75
fi
fi
human_readable $myisam_indexes myisam_indexes_HR 0
cecho "Current MyISAM index space = $myisam_indexes_HR $unit"
human_readable $key_buffer_size key_buffer_size_HR 0
cecho "Current key_buffer_size = $key_buffer_size_HR $unit"
cecho "Key cache miss rate is 1 / $key_cache_miss_rate"
cecho "Key buffer fill ratio = $key_buffer_ratio %"
if [ $key_cache_miss_rate -le 100 ] && [ $key_cache_miss_rate -gt 0 ] && [ $key_buffer_ratioRND -ge 80 ]; then
cecho "You could increase key_buffer_size" $boldred
cecho "It is safe to raise this up to 1/4 of total system memory;"
cecho "assuming this is a dedicated database server."
elif [ $key_buffer_ratioRND -ge 80 ] && [ $key_buffer_size -le $myisam_indexes ] ; then
cecho "You could increase key_buffer_size" $boldred
cecho "It is safe to raise this up to 1/4 of total system memory;"
cecho "assuming this is a dedicated database server."
elif [ $key_cache_miss_rate -ge 10000 ] || [ $key_buffer_ratioRND -le 50 ] ; then
cecho "Your key_buffer_size seems to be too high." $red
cecho "Perhaps you can use these resources elsewhere" $red
else
cecho "Your key_buffer_size seems to be fine" $green
fi
}
function check_query_cache () {
## -- Query Cache -- ##
cecho "QUERY CACHE" $boldblue
mysql_variable \'version\' mysql_version
mysql_variable \'query_cache_size\' query_cache_size
mysql_status \'Qcache_free_memory\' qcache_free_memory
mysql_status \'Qcache_lowmem_prunes\' qcache_lowmem_prunes
if [ -z $query_cache_size ] ; then
cecho "You are using MySQL $mysql_version, no query cache is supported. \nI recommend an upgrade to MySQL
4.0 or better" $red
elif [ $query_cache_size -eq 0 ] ; then
cecho "Query cache is supported but not enabled" $red
cecho "Perhaps you should set the query_cache_size" $red
else
let qcache_used_memory=$query_cache_size-$qcache_free_memory
qcache_fill_ratio=$(echo "scale=2; $qcache_used_memory * 100 / $query_cache_size" | bc -l)
qcache_fill_ratio_HR=$(echo "scale=0; $qcache_fill_ratio / 1" | bc -l)
cecho "Query cache is enabled" $green
human_readable $query_cache_size query_cache_size_HR
cecho "Current query_cache_size = $query_cache_size_HR $unit"
human_readable $qcache_used_memory qcache_used_memory_HR
cecho "Current query_cache_used = $qcache_used_memory_HR $unit"
cecho "Current Query cache fill ratio = $qcache_fill_ratio %"
if [ $qcache_fill_ratio_HR -le 25 ] ; then
cecho "Your query_cache_size seems to be too high." $red
cecho "Perhaps you can use these resources elsewhere" $red
fi
if [ $qcache_lowmem_prunes -ge 50 ] && [ $qcache_fill_ratio_HR -ge 80 ]; then
cecho "However, \c"
cecho "$qcache_lowmem_prunes \c" $boldred
cecho "queries have been removed from the query cache due to lack of memory"
cecho "Perhaps you should raise query_cache_size" $boldred
fi
fi
}
function check_sort_operations () {
## -- Sort Operations -- ##
cecho "SORT OPERATIONS" $boldblue
mysql_status \'Sort_merge_passes\' sort_merge_passes
mysql_status \'Sort_scan\' sort_scan
mysql_status \'Sort_range\' sort_range
mysql_variable \'sort_buffer%\' sort_buffer_size
mysql_variable \'read_rnd_buffer_size\' read_rnd_buffer_size
let total_sorts=$sort_scan+$sort_range
if [ -z $read_rnd_buffer_size ] ; then
mysql_variable \'record_buffer\' read_rnd_buffer_size
fi
## Correct rounding error in mysqld where 512K != 524288 ##
let sort_buffer_size=$sort_buffer_size+8
let read_rnd_buffer_size=$read_rnd_buffer_size+8
human_readable $sort_buffer_size sort_buffer_size_HR
cecho "Current sort_buffer_size = $sort_buffer_size_HR $unit"
human_readable $read_rnd_buffer_size read_rnd_buffer_size_HR
cecho "Current record/read_rnd_buffer_size = $read_rnd_buffer_size_HR $unit"
if [ $total_sorts -eq 0 ] ; then
cecho "No sort operations have been performed"
passes_per_sort=0
fi
if [ $sort_merge_passes -ne 0 ] ; then
let passes_per_sort=$sort_merge_passes/$total_sorts
else
passes_per_sort=0
fi
if [ $passes_per_sort -ge 2 ] ; then
cecho "On average \c"
cecho "$passes_per_sort \c" $boldred
cecho "sort merge passes are made per sort operation"
cecho "You should raise your sort_buffer_size"
cecho "You should also raise your \c"
if [ $major_version == '3.23' ] ; then
cecho "record_rnd_buffer_size"
else
cecho "read_rnd_buffer_size"
fi
else
cecho "Sort buffer seems to be fine" $green
fi
}
function check_join_operations () {
## -- Joins -- ##
cecho "JOINS" $boldblue
mysql_status \'Select_full_join\' select_full_join
mysql_status \'Select_range_check\' select_range_check
mysql_variable \'join_buffer%\' join_buffer_size
human_readable $join_buffer_size join_buffer_size_HR
cecho "Current join_buffer_size = $join_buffer_size_HR $unit"
cecho "You have had $select_full_join queries where a join could not use an index properly"
if [ $select_range_check -eq 0 ] && [ $select_full_join -eq 0 ] ; then
cecho "Your joins seem to be using indexes properly" $green
fi
if [ $select_full_join -gt 0 ] ; then
print_error='true'
fi
if [ $select_range_check -gt 0 ] ; then
cecho "You have had $select_range_check joins without keys that check for key usage after each row" $red
print_error='true'
fi
## Debuging ##
# print_error='true'
if [ $print_error ] ; then
if [ $major_version == '3.23' ] || [ $major_version == '4.0' ] ; then
cecho "You should enable \"log-long-format\" "
elif [ $major_version == '4.1' ] || [ $major_version == '5.0' ] || [ $major_version == '5.1' ] ; then
cecho "You should enable \"log-queries-not-using-indexes\""
fi
cecho "Then look for non indexed joins in the slow query log."
cecho "If you are unable to optimize your queries you may want to increase your"
cecho "join_buffer_size to accommodate larger joins in one pass."
fi
# XXX Add test for join_buffer_size
}
check_tmp_tables () {
## -- Temp Tables -- ##
cecho "TEMP TABLES" $boldblue
mysql_status \'Created_tmp_tables\' created_tmp_tables
mysql_status \'Created_tmp_disk_tables\' created_tmp_disk_tables
mysql_variable \'tmp_table_size\' tmp_table_size
human_readable $tmp_table_size tmp_table_size_HR
if [ $created_tmp_tables -eq 0 ] ; then
tmp_disk_tables=0
else
let tmp_disk_tables=created_tmp_disk_tables*100/created_tmp_tables
fi
cecho "Current tmp_table_size = $tmp_table_size_HR $unit"
cecho "$tmp_disk_tables% of tmp tables created were disk based"
if [ $tmp_disk_tables -ge 25 ] ; then
cecho "Perhaps you should increase your tmp_table_size" $red
else
cecho "Created disk tmp tables ratio seems fine" $green
fi
}
function check_table_cache () {
## -- Table Cache -- ##
cecho "TABLE CACHE" $boldblue
mysql_variable \'datadir\' datadir
mysql_variable \'table_cache\' table_cache
## /* MySQL +5.1 version of table_cache */ ##
mysql_variable \'table_open_cache\' table_open_cache
mysql_variable \'table_definition_cache\' table_definition_cache
mysql_status \'Open_tables\' open_tables
mysql_status \'Opened_tables\' opened_tables
mysql_status \'Open_table_definitions\' open_table_definitions
# socket_owner=`find $socket -printf '%u\n'`
socket_owner=`ls -l $socket | awk '{ print $3 }'`
script_runner=`whoami`
table_count=`$mysql -Bse "/*!50000 SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE'
*/"`
if [ -z $table_count ] ; then
if [ "$script_runner" != "$socket_owner" ] && [ "$script_runner" != "root" ] ; then
cecho "You are not '$socket_owner' or 'root'" $red
cecho "I am unable to determine the table_count!" $red
else
table_count=`find $datadir 2>&1 | grep -c .frm$`
fi
fi
if [ $table_open_cache ] ; then
table_cache=$table_open_cache
fi
if [ $opened_tables -ne 0 ] && [ $table_cache -ne 0 ] ; then
let table_cache_hit_rate=$open_tables*100/$opened_tables
let table_cache_fill=$open_tables*100/$table_cache
elif [ $opened_tables -eq 0 ] && [ $table_cache -ne 0 ] ; then
table_cache_hit_rate=100
let table_cache_fill=$open_tables*100/$table_cache
else
cecho "ERROR no table_cache ?!" $boldred
exit 1
fi
if [ $table_cache ] && [ ! $table_open_cache ] ; then
cecho "Current table_cache value = $table_cache tables"
fi
if [ $table_open_cache ] ; then
cecho "Current table_open_cache = $table_open_cache tables"
cecho "Current table_definition_cache = $table_definition_cache tables"
fi
if [ $table_count ] ; then
cecho "You have a total of $table_count tables"
fi
if [ $table_cache_fill -lt 95 ] ; then
cecho "You have \c"
cecho "$open_tables \c" $green
cecho "open tables."
cecho "The table_cache value seems to be fine" $green
elif [ $table_cache_hit_rate -le 85 -o $table_cache_fill -ge 95 ]; then
cecho "You have \c"
cecho "$open_tables \c" $boldred
cecho "open tables."
cecho "Current table_cache hit rate is \c"
cecho "$table_cache_hit_rate%\c" $boldred
cecho ", while \c"
cecho "$table_cache_fill% \c" $boldred
cecho "of your table cache is in use"
cecho "You should probably increase your table_cache" $red
else
cecho "Current table_cache hit rate is \c"
cecho "$table_cache_hit_rate%\c" $green
cecho ", while \c"
cecho "$table_cache_fill% \c" $green
cecho "of your table cache is in use"
cecho "The table cache value seems to be fine" $green
fi
if [ $table_definition_cache ] && [ $table_definition_cache -le $table_count ] && [ $table_count -ge 100 ] ; then
cecho "You should probably increase your table_definition_cache value." $red
fi
}
function check_table_locking () {
## -- Table Locking -- ##
cecho "TABLE LOCKING" $boldblue
mysql_status \'Table_locks_waited\' table_locks_waited
mysql_status \'Table_locks_immediate\' table_locks_immediate
mysql_variable \'concurrent_insert\' concurrent_insert
mysql_variable \'low_priority_updates\' low_priority_updates
if [ "$concurrent_insert" = 'ON' ]; then
let concurrent_insert=1
elif [ "$concurrent_insert" = 'OFF' ]; then
let concurrent_insert=0
fi
cecho "Current Lock Wait ratio = \c"
if [ $table_locks_waited -gt 0 ]; then
let immediate_locks_miss_rate=$table_locks_immediate/$table_locks_waited
cecho "1 : $immediate_locks_miss_rate" $red
else
let immediate_locks_miss_rate=99999 # perfect
cecho "0 : $questions" $green
fi
if [ $immediate_locks_miss_rate -lt 5000 ] ; then
cecho "You may benefit from selective use of InnoDB."
if [ "$low_priority_updates" == 'OFF' ] ; then
cecho "If you have long running SELECT's against MyISAM tables \c"
cecho "and perform frequent updates consider setting 'low_priority_updates=1'"
fi
if [ $concurrent_insert -le 1 ] && [ $major_version == '5.0' ] ; then
cecho "If you have a high concurrentcy of inserts on Dynamic row-lenght tables \c"
cecho "consider setting 'concurrent_insert=2'."
elif [ $concurrent_insert -le 1 ] && [ $major_version == '5.1' ] ; then
cecho "If you have a high concurrentcy of inserts on Dynamic row-lenght tables \c"
cecho "consider setting 'concurrent_insert=2'."
fi
else
cecho "Your table locking seems to be fine" $green
fi
}
function check_table_scans () {
## -- Table Scans -- ##
cecho "TABLE SCANS" $boldblue
mysql_status \'Com_select\' com_select
mysql_status \'Handler_read_rnd_next\' read_rnd_next
mysql_variable \'read_buffer_size\' read_buffer_size
if [ -z $read_buffer_size ] ; then
mysql_variable \'record_buffer\' read_buffer_size
fi
human_readable $read_buffer_size read_buffer_size_HR
cecho "Current read_buffer_size = $read_buffer_size_HR $unit"
if [ $com_select -gt 0 ] ; then
let full_table_scans=$read_rnd_next/$com_select
cecho "Current table scan ratio = $full_table_scans : 1"
if [ $full_table_scans -ge 4000 ] && [ $read_buffer_size -le 2097152 ] ; then
cecho "You have a high ratio of sequential access requests to SELECTs" $red
cecho "You may benefit from raising \c" $red
if [ $major_version == '3.23' ] ; then
cecho "record_buffer \c" $red
else
cecho "read_buffer_size \c" $red
fi
cecho "and/or improving your use of indexes." $red
elif [ $read_buffer_size -gt 2097152 ] ; then
cecho "read_buffer_size is over 2 MB \c" $red
cecho "there is probably no need for such a large read_buffer" $red
else
cecho "read_buffer_size seems to be fine" $green
fi
else
cecho "read_buffer_size seems to be fine" $green
fi
}
function check_innodb_status () {
## -- InnoDB -- ##
mysql_variable \'have_innodb\' have_innodb
if [ "$have_innodb" = "YES" ] ; then
mysql_variable \'innodb_buffer_pool_size\' innodb_buffer_pool_size
echo
cecho "INNODB STATUS" $boldblue
innodb_indexes=`$mysql -Bse "/*!50000 SELECT SUM(INDEX_LENGTH) from information_schema.TABLES where
ENGINE='InnoDB' */"`
if [ ! -z "$innodb_indexes" ] ; then
human_readable $innodb_indexes innodb_indexes_HR 0
cecho "Current InnoDB index space = $innodb_indexes_HR $unit"
else
cecho "Cannot find InnoDB index space prior to 5.0.x" $red
fi
human_readable $innodb_buffer_pool_size innodb_buffer_pool_sizeHR
cecho "Current innodb_buffer_pool_size = $innodb_buffer_pool_sizeHR $unit"
cecho "Depending on how much space your innodb indexes take up it may be safe"
cecho "to increase this value to up to 1 / 3 of total system memory"
echo
$mysql -s -e "SHOW /*!50000 ENGINE */INNODB STATUS\G"
else
cecho "No InnoDB Support Enabled!" $boldred
fi
}
function total_memory_used () {
## -- Total Memory Usage -- ##
cecho "MEMORY USAGE" $boldblue
mysql_variable \'read_buffer_size\' read_buffer_size
mysql_variable \'sort_buffer_size\' sort_buffer_size
mysql_variable \'thread_stack\' thread_stack
mysql_variable \'max_connections\' max_connections
mysql_status \'Max_used_connections\' max_used_connections
let per_thread_buffers=($read_buffer_size+$sort_buffer_size+$thread_stack)*$max_used_connections
let per_thread_max_buffers=($read_buffer_size+$sort_buffer_size+$thread_stack)*$max_connections
mysql_variable \'innodb_buffer_pool_size\' innodb_buffer_pool_size
if [ -z $innodb_buffer_pool_size ] ; then
innodb_buffer_pool_size=0
fi
mysql_variable \'innodb_additional_mem_pool_size\' innodb_additional_mem_pool_size
if [ -z $innodb_additional_mem_pool_size ] ; then
innodb_additional_mem_pool_size=0
fi
mysql_variable \'innodb_log_buffer_size\' innodb_log_buffer_size
if [ -z $innodb_log_buffer_size ] ; then
innodb_log_buffer_size=0
fi
mysql_variable \'key_buffer_size\' key_buffer_size
mysql_variable \'query_cache_size\' query_cache_size
if [ -z $query_cache_size ] ; then
query_cache_size=0
fi
let
global_buffers=$innodb_buffer_pool_size+$innodb_additional_mem_pool_size+$innodb_log_buffer_size+$key_buffer_size+$query_cache_size
let total_memory=$global_buffers+$per_thread_buffers
let max_memory=$global_buffers+$per_thread_max_buffers
human_readable $total_memory total_memoryHR 0
cecho "Max Memory Ever Allocated : $total_memoryHR $unit" $boldred
human_readable $max_memory max_memoryHR 0
cecho "Configured Max Memory Limit : $max_memoryHR $unit" $boldred
total_system_memory=`free -b | grep -v buffers | awk '{ s += $2 } END { printf("%ld\n", s ) }'`
human_readable $total_system_memory total_system_memoryHR 0
cecho "Total System Memory : $total_system_memoryHR $unit" $boldred
}
function snarky () {
## -- Be Snarky -- ##
fortune=`which fortune 2>/dev/null`
if [ -z $fortune ] ; then
echo "What the hell sort of straight-lace bastard doesn't have fortune installed?"
else
$fortune
fi
}
## Required Functions ##
function login_validation () {
check_for_socket # determine the socket location -- 1st login
check_for_plesk_passwords # determine the login method -- 2nd login
check_mysql_login # determine if mysql is accepting login -- 3rd login
export major_version=`$mysql -Bse 'select substring_index(version(), ".", +2)'`
export OS=`uname`
mysql_status \'Questions\' questions
}
## Optional Components Groups ##
function banner_info () {
print_banner ; echo
check_mysql_version ; echo
post_uptime_warning ; echo
}
function misc () {
check_slow_queries ; echo
check_used_connections ; echo
check_threads ; echo
}
function memory () {
total_memory_used ; echo
check_key_buffer_size ; echo
check_query_cache ; echo
check_sort_operations ; echo
check_join_operations ; echo
}
function file () {
check_table_cache ; echo
check_tmp_tables ; echo
check_table_scans ; echo
check_table_locking ; echo
}
function all () {
banner_info
misc
memory
file
# snarky
}
function prompt () {
prompted='true'
read -p "Username [anonymous] : " user
read -rsp "Password [<none>] : " pass
cecho "\n\c"
read -p "Socket [ /var/lib/mysql/mysql.sock ] : " socket
if [ -z $socket ] ; then
export socket='/var/lib/mysql/mysql.sock'
fi
if [ -n $pass ] ; then
pass_flag='-p'
fi
mysql="mysql -S $socket -u$user $pass_flag$pass"
mysqladmin="mysqladmin -S $socket -u$user $pass_flag$pass"
echo $mysql
check_for_socket
check_mysql_login
if [ $? = 1 ] ; then
exit 1
fi
read -p "Mode to test (see usage:) [all] : " pmode
case $pmode in
banner )
banner_info
;;
misc )
misc
;;
memory )
memory
;;
file )
file
;;
innodb )
innodb
;;
all | *)
all
;;
esac
}
if [ -z $1 ] ; then
login_validation
mode='ALL'
elif [ "$1" != "prompt" ] || [ "$1" != "PROMPT" ] ; then
login_validation
mode=$1
elif [ "$1" = "prompt" ] || [ "$1" = "PROMPT" ] ; then
mode=$1
fi
case $mode in
ALL | all )
cecho "\n\c"
all
;;
mem | memory | MEM | MEMORY )
cecho "\n\c"
memory
;;
file | FILE | disk | DISK )
cecho "\n\c"
file
;;
banner | BANNER | header | HEADER | head)
banner_info
;;
misc | MISC | miscelaneous )
cecho "\n\c"
misc
;;
innodb | INNODB )
banner_info
check_innodb_status ; echo
;;
prompt | PROMPT )
prompt
;;
*)
cecho "usage: $0 [ all | banner | file | innodb | memory | misc | promp ]" $boldred
exit 1
;;
esac
