Конфигурация mysql server 5.1 на win 2008 (требуется помощь экспертов)

Я использую MySql server 5.1.52-community на стандартной версии win 2008 R2 x64. свой производственный сервер. когда уровень приложения «другой сервер» вводит слишком много запросов / TCP-соединений / «более 2000 запросов в секунду», уровень приложения останавливается.

Уровень приложений - это очень стабильный корпоративный продукт, который используется на слишком многих предприятиях. и служба поддержки четко сказала, что что-то не так с сервером db.

поэтому я много раз настраиваю конфигурацию mysql, и все же в случаях большой нагрузки уровень приложения останавливается.

сервер получил 16 ГБ памяти, но mysql использовал только около 5 ГБ. Итак, первый вопрос: как разрешить службе сервера mysql использовать до 12 ГБ.

я заметил одну странную вещь: процесс mysqld имеет более миллиона дескрипторов «1,114,345», и это очень ненормально, когда любой нормальный процесс имеет максимум 2000 дескрипторов! так что эксперты это нормально! если нет, то как это исправить.

эта база данных - innoDB без представлений или SP.

пожалуйста, помогите, спасибо,

РЕДАКТИРОВАТЬ: после просмотра комментариев экспертов, вот текущие конфигурации mysql:

[client]

port=3306

[mysql]

default-character-set=utf8


# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this 
# file.
#
[mysqld]

# The TCP/IP Port the MySQL Server will listen on
port=3306


#Path to installation directory. All paths are usually resolved relative to this.
basedir="C:/Autonomy/MySQL/"

#Path to the database root
datadir="D:/MySQL Datafiles/data/"

# The default character set that will be used when a new schema or table is
# created and no character set is defined
default-character-set=utf8

# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB

# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=400

# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=84M

# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_cache=256

# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=369M


# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before.  This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=8

#*** MyISAM Specific options

# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G

# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method.  This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=738M

# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=320M

# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=64K
read_rnd_buffer_size=256K

# This buffer is allocated when MySQL needs to rebuild the index in
# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
# into an empty table. It is allocated per thread so be careful with
# large settings.
sort_buffer_size=256K


#*** INNODB Specific options ***
innodb_data_home_dir="D:/MySQL Datafiles/"

# Use this option if you have a MySQL server with InnoDB support enabled
# but you do not plan to use it. This will save memory and disk space
# and speed up some things.
#skip-innodb

# Additional memory pool that is used by InnoDB to store metadata
# information.  If InnoDB requires more memory for this purpose it will
# start to allocate it from the OS.  As this is fast enough on most
# recent operating systems, you normally do not need to change this
# value. SHOW INNODB STATUS will display the current amount used.
innodb_additional_mem_pool_size=26M

# If set to 1, InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. If you are
# willing to compromise this safety, and you are running small
# transactions, you may set this to 0 or 2 to reduce disk I/O to the
# logs. Value 0 means that the log is only written to the log file and
# the log file flushed to disk approximately once per second. Value 2
# means the log is written to the log file at each commit, but the log
# file is only flushed to disk approximately once per second.
innodb_flush_log_at_trx_commit=2

# The size of the buffer InnoDB uses for buffering log data. As soon as
# it is full, InnoDB will have to flush it to disk. As it is flushed
# once per second anyway, it does not make sense to have it very large
# (even with long transactions).
innodb_log_buffer_size=13M

# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
# row data. The bigger you set this the less disk I/O is needed to
# access data in tables. On a dedicated database server you may set this
# parameter up to 80% of the machine physical memory size. Do not set it
# too large, though, because competition of the physical memory may
# cause paging in the operating system.  Note that 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=1243M
innodb_buffer_pool_size=4096M

# Size of each log file in a log group. You should set the combined size
# of log files to about 25%-100% of your buffer pool size to avoid
# unneeded buffer pool flush activity on log file overwrite. However,
# note that a larger logfile size will increase the time needed for the
# recovery process.
innodb_log_file_size=622M

# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
innodb_thread_concurrency=18
#Enter a name for the query log file. Otherwise a default name will be used.
# incase of remove command # for log sql queries will be logged
#log



#innod table extend
innodb_data_file_path=ibdata1:18M;inno_db_001:400M:autoextend
#innodb_log_group_home_dir="D:/MySQL Datafiles/"
lower_case_table_names=1
innodb_file_io_threads=4
innodb_lock_wait_timeout=50


#replication configuration
log-bin=mysql-bin
server-id = 1

поэтому я думаю, что если я изменился:
innodb_buffer_pool_size = 4096 млн
к
innodb_buffer_pool_size = 12 ГБ
12 ГБ будет выделено для службы / процесса mysqld. Правильно?? что еще нужно изменить?

Я также обнаружил, что если запрос занимает более 15 минут, приложение будет считать его неудачной попыткой, хотя mysql все еще работает над его получением! может быть, из-за этого ручки становятся очень большими!
также я думаю, что некоторые запросы должны считываться с подключенного сетевого диска. но ничего нельзя сделать, чтобы это изменить. это полностью вне моего контроля.