New Sample config file.

The changes for actual loads and memory sizes are to be done after
text and format are  improved.

support-files/my-innodb-heavy-4G.cnf.sh

+#BEGIN CONFIG INFO
+#DESCR:  4G,Innodb only,ACID, Few Connections heavy queries
+#TYPE: SYSTEM
+#END CONFIG INFO
+
+# This is example config file for systems with 4G of memory running mostly MySQL
+# using MyISAM only tables and running complex queries with few connections
+# 
+
+
+
+
+#
+# You can copy this file to
+# /etc/my.cnf to set global options,
+# mysql-data-dir/my.cnf to set server-specific options (in this
+# installation this directory is @localstatedir@) or
+# ~/.my.cnf to set user-specific options.
+#
+# One can in this file use all long options that the program supports.
+# If you want to know which options a program support, run the program
+# with --help option.
+
+
+
+# The following options will be passed to all MySQL clients
+# But note, only client programs shipped by MySQL are guarantied to read it
+# If you wish your software to read this section you would need to specify
+# it as an option during MySQL client library initialization
+[client]
+#password	= your_password
+port		= @MYSQL_TCP_PORT@
+socket		= @MYSQL_UNIX_ADDR@
+
+# ********** Here follows entries for some specific programs
+
+# The MySQL server
+[mysqld]
+# generic configuration options
+
+port		= @MYSQL_TCP_PORT@
+socket		= @MYSQL_UNIX_ADDR@
+
+
+# Back Log is a number of connection OS can keep in queue, before MySQL
+# connection manager thread has processed them. If you have very intensive
+# connection rate and experience "connection refused" errors you might need
+# to increase this value
+back_log = 50
+
+
+# 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!
+#skip-networking
+
+# Maximum amount of concurrent sessions MySQL server will allow
+# One of these connections will be reserved for user with SUPER privelege
+# to allow administrator to login even if server is overloaded.
+max_connections = 100
+
+
+# Maximum amount of errors allowed per host. If this limit is reached
+# host will be blocked from connection MySQL server until "flush hosts"
+# is run or server restart. Invalid passwords as any other errors at 
+# connect phase results in increasing this value. See 
+# Aborted_Connects status variable for global counter.
+max_connect_errors = 10
+
+
+# Amount of tables server can keep open at the time. Each table 
+# may require up to 2 file handlers (for MERGE tables even more)
+# so make sure to have amount of open files allowed at least 4096
+# see open-files-limit in [mysqld_safe]
+table_cache = 2048
+
+# Do not use file level locking. Enabled file locking give performance
+# hit, so use it only in case you have serveral database instances
+# running on the same files (note some restrictions still apply!) 
+# or if you use other software relaying on locking MyISAM tables 
+# on file level
+#enable-locking
+
+# This packets limits maximum size of BLOB server can handle 
+# as well as maximum query size server can process
+# enlarged dynamically, for each connection
+max_allowed_packet = 16M
+
+# Binary log cache is used for logging transactions to binary log
+# all statements from transactions are buffered in binary log cache
+# and wrote to the binary log at once on commit
+# if transaction is large than this value disk temporary file is used.
+# This buffer is allocated per connection on first update statement 
+# in transaction
+binlog_cache_size = 1M
+
+
+# Maximum allowed size for single HEAP (in memory) table
+# This option is protection from accidential creation of the HEAP
+# table which would take all the memory resources
+max_heap_table_size=64M
+
+
+# Sort buffer used to perform sorts for some of ORDER BY and 
+# GROUP BY queries. If sorted data does not fit into sort buffer
+# Disk based merge sort is used - See sort_merge_passes.
+# Allocated per thread if sort is needed
+sort_buffer_size = 8M
+
+# This buffer is used for optimization of full joins (joins without indexes)
+# Such joins are very bad for performance in most cases anyway, but having
+# this variable large reduces performance impact.
+# see select_full_join status variable for full joins count
+# Allocated per thread if full join is found
+join_buffer_size=8M
+
+
+# Cache threads on disconnect instead of destroying them
+# thread cache allows to greatly reduce amount of thread
+# creations needed if you have a lot of connections
+thread_cache = 8
+
+
+# Try number of CPU's*(2..4) for thread_concurrency
+# This value makes sense only on few systems (as Solaris)
+# which support thread_concurrency() setting
+thread_concurrency = 8
+
+
+# Query cache is used to cache SELECT results and later return
+# them without actual query execution for exactly the same query
+# Having query cache enabled may give great benefit if your have
+# typical queries and rarely changed tabled
+# see Qcache_lowmem_prunes status variable to check if current 
+# value is enough for your load
+# Note: In case your table change all the time or you never have
+# textually same queries query cache maay bring slowdown
+# instead of performance improvement
+query_cache_size = 64M
+
+# Cache only result sets which are smaller than this limit
+# This setting is protection of very large result set overwriting
+# all queries in query cache
+query_cache_limit = 2M
+
+# Minimum word length to be indexed by full text search index
+# you might wish to decrease it if you need to search on shorter words
+ft_min_word_len = 4
+
+# If your system supports memlock() function you might use this option
+# while running MySQL to keep it locking in memory, avoid potential
+# swapping out in case of high memory pressure. Good for performance.
+#memlock
+
+# Table type which is used by default, if not specified by CREATE TABLE
+# it affects only tables explicitly created by user.
+default_table_type = MYISAM
+
+# Thread stack size to use. This amount of memory is always reserved at 
+# connection time. MySQL itself usually needs no more than 64K of memory,
+# while if you use your own stack hungry UDF functions or OS requires more 
+# stack for some operations, you might need to set it higher
+thread_stack = 192K
+
+# Set default transaction isolation level. Levels available are:
+# READ-UNCOMMITED, READ-COMMITED, REPEATABLE-READ, SERIALIZABLE
+transaction_isolation = REPEATABLE-READ
+
+# Maximum size for internal in memory temporary table. If table 
+# grows larger it is automatically converted to disk based table
+# This limitaion is for single table. There can be many of them.
+tmp_table_size = 64M
+
+# binary logging is required for acting MASTER in replication
+# You also need binary log if you need ability to do point
+# in time recovery from your latest backup
+log_bin
+
+# If you're using chaining replication A->B->C you might wish to
+# turn on this option on server B. It makes updates done by
+# slave thread also logged in binary log. Normally they are not
+#log_slave_updates
+
+
+# Full query log. Every query (even with incorrect syntax) server gets goes here.
+# Useful for debugging. Normally is disabled in production
+#log
+
+# If you have  any problems with MySQL server you might enable Warnings logging and 
+# examine error log for possible explanations. 
+#log_warnings
+
+# Log slow queries. Slow queries are queries which take more than defined amount of time
+# or which do not use indexes well, if log_long_format is enabled
+# It is notmally good idea to have this on if you frequently add new queries to the system
+log_slow_queries
+
+
+# All queries taking more than this amount of time will be trated as slow. Do not use value 1
+# here as this will result even in very fast queries logged sometimes, as MySQL measures time with
+# second accuracy only.
+long_query_time = 2
+
+# Log more information in slow query log. Normally it is good to have this on.
+# It results in logging of queries not using indexes additionally to long running queries.
+log_long_format
+
+
+
+# Temporary directory is used by MySQL for storing temporary files, for example
+# used to do disk based large sorts, as well as for internal and explicit 
+# temporary tables.
+# It might be good to set it to swapfs/tmpfs filesystem if you do not have very
+# large temporary files created or set it to dedicated disk
+# You can specify several paths here spliting them by ";" they will be used in
+# round-robin fashion
+#tmpdir		= /tmp
+
+
+#***  Replication related settings 
+
+
+# This value is required both for master ans slave
+# If you have single master it is typical to use value 1 for it
+# 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
+
+
+# To configure this server as Replication Slave you will need
+# to set its server_id to some unique value, different from Master 
+# and all slaves in the group.
+# You also can disable log-bin as logs are not required (while recomended)
+# for slaves
+# 
+#
+# The recomended way to set MASTER settings for the slave are:
+# 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';
+#
+# However if you need to replicate slave configuration over several boxes
+# you can use old approach:
+#
+#    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)
+#
+#
+# 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>
+
+# Make Slave ReadOnly.  Only user with SUPER privelege and slave 
+# thread will be able to modify it. You might use it to ensure 
+# no applications will accidently modify slave instead of master
+#read_only
+
+
+
+#*** MyISAM Specific options
+
+
+# Size of Key Buffer, used to cache index blocks for MyISAM tables
+# Do not set it larger than 30% of available memory, as some memory
+# is required by OS to cache rows.
+# Even if you're not using MyISAM tables still set it to 8-64M
+# as it will be used for internal temporary disk tables.
+key_buffer_size = 32M
+
+# Size of buffer used for doing full table scans for MyISAM tables
+# allocated per thread, as full scan is needed
+read_buffer_size = 2M
+
+# Buffer is used for caching the rows while doing Sorts 
+# Allocated per thread, then needed
+read_rnd_buffer_size = 16M
+
+# The bulk insert tree is used for optimization of index modification
+# for bulk inserts (hundreds+ values) and LOAD DATA INFILE
+# Do not set larger than key_buffer_size  for optimal performance
+# This buffer is allocated than bulk insert is detected
+bulk_insert_buffer_size = 64M
+
+
+# This buffer is allocated than MySQL needs to rebuild the Index,
+# in REPAIR, OPTIMZE, ALTER table statements as well as in 
+# LOAD DATA INFILE to empty table
+# it is allocated per thread so be careful with large settings.
+myisam_sort_buffer_size = 128M
+
+# Maximum size of temporary (sort) file index rebuild  can use.
+# If sort is estimated to take larger amount of space, mush slower
+# (keycache) index rebuild method will be used 
+myisam_max_sort_file_size = 10G
+
+# Use sort method in case the difference between sort file and 
+# Table index file is estimated to be less than this value
+myisam_max_extra_sort_file_size = 10G
+
+# If table has more than one index MyISAM can use more than one thread
+# to repair them in parallel. It makes sense if you have multiple of 
+# CPUs and planty of memory.
+myisam_repair_threads = 1
+
+# Automatically check and repair not properly closed MyISAM tables
+myisam_recover
+
+
+
+#*** BDB Specific options 
+
+# Use this option if you have BDB tables enabled but you do not plan to use them
+skip-bdb
+
+
+#*** INNODB Specific options
+
+# Use this option if you have INNODB tables enabled but you do not plan to use them
+#skip-innodb
+
+# Additional memory pool is used by Innodb to store metadata information. 
+# If Innodb needs more memory for this purpose to allocate it from OS
+# As it is fast enough on most recent OS you normally do not need to set it higher
+# SHOW INNODB STATUS will show current amount of it in use
+innodb_additional_mem_pool_size = 16M
+
+# Innodb, unlike MyISAM uses bufferpool to cache both indexes and row data
+# so you would normally wish to have it large up to 50-70% of your memory size
+# Note on 32bit systems you might be limited to 2-3.5G of user level memory 
+# per process so do not set it too high.
+innodb_buffer_pool_size = 2G
+
+# Innodb stores data in one or several files forming tablespace. If you have 
+# single logical drive for your data, single autoextending file would be good enough
+# In other case single file per device is often good choice. 
+# You may setup Innodb to use Raw disk partitions as well. Refer to the manual.
+innodb_data_file_path = ibdata1:10M:autoextend
+
+
+# Set this option if you would like Innodb tablespace files to be stored in other 
+# location. Default is MySQL datadir.
+#innodb_data_home_dir
+
+# Number of IO threads to use for async IO operations.  This value is hardcoded to
+# 4 on Unix 
+innodb_file_io_threads = 4
+
+
+# If you run into Innodb tablespace corruption, setting this to nonzero value will 
+# likely help you to dump your tables. Start from value 1 and increase it until
+# you're able to dump the table successfully.
+#innodb_force_recovery=1
+
+# Number of threads allowed inside of Innodb kernel. Best setting highly depends
+# on the application, hardware as well as OS scheduler properties
+# Too high value may lead to thread thrashing
+innodb_thread_concurrency = 16
+
+
+# If set to 1 Innodb will flush(fsync) logs to the disk at each transaction commit
+# which offers full ACID behavior, however if you can afford few last commited transaction
+# lost you can set this value to 2 or 0. Innodb will anyway flush the log file once 
+# per second.  0 - do not flush file at all.  2 - flush it to OS buffers but not to the disk.
+innodb_flush_log_at_trx_commit = 1
+
+
+# Innodb uses fast shutdown by default. However you can disable it to make Innodb to do
+# purge and Insert buffer merge on shutdown. It may increase shutdown time a lot but
+# Innodb will have not need to do it after next startup
+#innodb_fast_shutdown
+
+# Buffer Innodb shall use for buffering log data. As soon as it is full Innodb
+# will have to flush it. As it is flushed once per second anyway even with
+# long transactions it does not make sense to have it very large.
+innodb_log_buffer_size = 8M
+
+# Size of log file in group. You shall set combined size of log files large 25%-100% of
+# your buffer pool size to avoid not needed buffer pool flush activity on log file
+# overwrite.  Note however larger logfile size will increase time needed for recovery
+# process.
+innodb_log_file_size = 256M
+
+# Total number of files in the log group. Value 2-3 is usually good enough.
+innodb_log_files_in_group = 3
+
+# Location for Innodb log files. Default is MySQL datadir.  You may wish to
+# point it to dedicated hard drive or RAID1 volume for improved performance
+#innodb_log_group_home_dir
+
+# Maximum allowed Percentage of dirty pages in Innodb buffer pool.
+# If it is reached Innodb will start flushing them agressively not to run 
+# out of clean pages at all. This is a soft limit, not guarantied to be held.
+innodb_max_dirty_pages_pct = 90
+
+
+# Set flush method Innodb will use for Log.  Tablespace always uses doublewrite flush logic.
+#innodb_flush_method
+
+# How long Innodb transaction shall wait for lock to be granted before giving up.
+# This value does not correspond to deadlock resolution. Innodb will detect Deadlock
+# as soon as it is formed.
+innodb_lock_wait_timeout = 120
+
+
+
+[mysqldump]
+# Do not buffer whole result set in memory before writing it to file
+# required for dumping very large tables
+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 = 512M
+sort_buffer_size = 512M
+read_buffer = 8M
+write_buffer = 8M
+
+[myisamchk]
+key_buffer = 512M
+sort_buffer_size = 512M
+read_buffer = 8M
+write_buffer = 8M
+
+[mysqlhotcopy]
+interactive-timeout
+
+[mysqld_safe]
+# Increase amount of open files allowed per process
+# Warning: Make sure you have global system limit high enough
+# The high value is required for large number of opened tables
+open-files-limit = 8192