Discussione: Dimensione "massima" consigliata del DB

Questo è la configurazione MySQL di un server con molti utenti contemporanei e 2 GB di RAM. Il tuo ha meno, per cui devi assegnare ancora meno. Comunque potrebbe essere una base valida. Versione MySQL 5.x, ma non dovrebbe fare differenze per versioni minori, in quanto i valori sconosciuti non sono considerati.

I valri in grassetto sono essenziali per evitare lo swapping e per snellire (parecchio) il sistema. Usarlo solo come riferimento (non copia incolla) perché il sistema è Windows

Codice:

# Example MySQL config file for small systems.
#
# This is for a system with little memory (<= 64M) where MySQL is only used
# from time to time and it's important that the mysqld daemon
# doesn't use much resources.
#
# You can copy this file to
# C:/xampp/mysql/bin/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is C:/xampp/mysql/data) or
# ~/.my.cnf to set user-specific options.
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.
# The following options will be passed to all MySQL clients
[client] 
# password       = your_password 
port            = 3306 
socket          = "C:/xampp/mysql/mysql.sock"
# Here follows entries for some specific programs 
# The MySQL server
[mysqld]
port= 3306
socket= "C:/xampp/mysql/mysql.sock"
basedir="C:/xampp/mysql" 
tmpdir=C:/temp
datadir="C:/xampp/mysql/data"
skip-locking
key_buffer_size=16M
max_allowed_packet=4M
table_cache = 64
sort_buffer_size=512k
net_buffer_length = 8K
read_buffer_size=1M
read_rnd_buffer_size=4M
myisam_sort_buffer_size = 8M
 
# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
# 
# commented in by lampp security
#skip-networking
# Replication Master Server (default)
# binary logging is required for replication
# log-bin deactivated by default since XAMPP 1.4.11
#log-bin=mysql-bin
# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1
# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
#    the syntax is:
#
#    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
#    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
#    where you replace <host>, <user>, <password> by quoted strings and
#    <port> by the master's port number (3306 by default).
#
#    Example:
#
#    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
#    MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
#    start replication for the first time (even unsuccessfully, for example
#    if you mistyped the password in master-password and the slave fails to
#    connect), the slave will create a master.info file, and any later
#    change in this file to the variables' values below will be ignored and
#    overridden by the content of the master.info file, unless you shutdown
#    the slave server, delete master.info and restart the slaver server.
#    For that reason, you may want to leave the lines below untouched
#    (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id       = 2
#
# The replication master for this slave - required
#master-host     =   <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user     =   <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password =   <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port     =  <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin

# Point the following paths to different dedicated disks
#tmpdir = "C:/xampp/tmp"
#log-update = /path-to-dedicated-directory/hostname
# Uncomment the following if you are using BDB tables
#bdb_cache_size = 4M
#bdb_max_lock = 10000
# Comment the following if you are using InnoDB tables
skip-innodb
#innodb_data_home_dir = "C:/xampp/mysql/"
#innodb_data_file_path = ibdata1:10M:autoextend
#innodb_log_group_home_dir = "C:/xampp/mysql/"
#innodb_log_arch_dir = "C:/xampp/mysql/"
## You can set .._buffer_pool_size up to 50 - 80 %
## of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 16M
#innodb_additional_mem_pool_size = 2M
## Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50
#If no specific storage engine/table type is defined in an SQL-Create statement the default type will be used.
default-storage-engine=myisam
#Don't cache results that are bigger than this.
#query_cache_limit=1M
#minimal size of unit in wich space for results is allocated (last unit will be trimed after writing all result data
#query_cache_min_res_unit=4096k
#The memory allocated to store results from old queries.
query_cache_size=128M
#Query cache type to use.
#query_cache_type=1
#Lock mysqld in memory.(=Don't swap.)
memlock
 
 
 
 

#The number of simultaneous clients allowed.
#max_connections=400
 
 

#The number of simultaneous clients allowed.
max_connections=300
 
 
 

#Using this option will cause most temporary files created to use a small set of names, rather than a unique name for each new file.
temp-pool
 
 
 
 
 
 
 
 
 
 

#Allow connections via named pipes (Windows NT+ only). Note: you can specify a pipe name on the advanced network page, if required.
#enable-named-pipe

#Don't cache host names.
#skip-host-cache
#Don't resolve hostnames. All hostnames are IP's or 'localhost'.
#skip-name-resolve

#Don't allow new user creation by the user who has no write privileges to the mysql.user table.
safe-user-create
#Disallow authentication for accounts that have old (pre-4.1) passwords.
#secure-auth
 
 
 

#Enter a name for the slow query log. Otherwise a default name will be used.
log-slow-queries=
 

[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M
[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout

Non funziona il grassetto in code

quindi:
skip-innodb
max_connections=300
temp-pool
skip-locking
key_buffer_size=16M
table_cache = 64
sort_buffer_size=512k
read_buffer_size=1M
read_rnd_buffer_size=4M
myisam_sort_buffer_size = 8M
memlock

Con memlock MySQL non verrà mai swappato