錯誤：無法連接到'SERVER_IP'上的MySQL服務器（99）

Question

我正在使用PHP5和MySQL，一切都很好，直到超過9,000個請求被髮送到MySQL服務器。

例如，我試圖從一個具有10,000條記錄（行）的CSV文件中進行10,000次插入。 當循環運行的我得到這個錯誤：

Can't connect to MySQL server on '192.168.10.11' (99).

我寫了一個小圈做萬select field_id from table where field_id = XX，我得到了同樣的錯誤。

我的燈用Debian的擠壓，PHP5，MySQL服務器5.1，Apache2的

的重要說明：使用MySQL工作臺或MySQL CLI沒有錯誤，只是在網絡環境。

這是my.conf

# 
# The MySQL database server configuration file. 
# 
# You can copy this to one of: 
# - "/etc/mysql/my.cnf" to set global options, 
# - "~/.my.cnf" to set user-specific options. 
# 
# One can use all long options that the program supports. 
# Run program with --help to get a list of available options and with 
# --print-defaults to see which it would actually understand and use. 
# 
# For explanations see 
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html 

# This will be passed to all mysql clients 
# It has been reported that passwords should be enclosed with ticks/quotes 
# escpecially if they contain "#" chars... 
# Remember to edit /etc/mysql/debian.cnf when changing the socket location. 
[client] 
port  = 3306 
socket  = /var/run/mysqld/mysqld.sock 

# Here is entries for some specific programs 
# The following values assume you have at least 32M ram 

# This was formally known as [safe_mysqld]. Both versions are currently parsed. 
[mysqld_safe] 
socket  = /var/run/mysqld/mysqld.sock 
nice  = 0 

[mysqld] 
# 
# * Basic Settings 
# 
user  = mysql 
pid-file = /var/run/mysqld/mysqld.pid 
socket  = /var/run/mysqld/mysqld.sock 
port  = 3306 
basedir  = /usr 
datadir  = /var/lib/mysql 
tmpdir  = /tmp 
language = /usr/share/mysql/english 
skip-external-locking 
skip-name-resolve 

wait_timeout=60 
connect_timeout=10 
max_allowed_packet=16M 
interactive_timeout=120 
join_buffer_size=1M 
query_cache_size=128M 
query_cache_limit=2M 
table_cache=1024 
sort_buffer_size=8M 
read_buffer_size=2M 
read_rnd_buffer_size=4M 
key_buffer = 256M 
key_buffer_size=64M 

# 
# Instead of skip-networking the default is now to listen only on 
# localhost which is more compatible and is not less secure. 
#bind-address  = 127.0.0.1 
# 
# * Fine Tuning 
# 
#key_buffer  = 16M 
#max_allowed_packet = 16M 
thread_stack  = 192K 
thread_cache_size  = 8 
# This replaces the startup script and checks MyISAM tables if needed 
# the first time they are touched 
myisam-recover   = BACKUP 
#max_connections  = 100 
#table_cache   = 64 
#thread_concurrency  = 10 
# 
# * Query Cache Configuration 
# 
#query_cache_limit = 1M 
#query_cache_size  = 16M 
# 
# * Logging and Replication 
# 
# Both location gets rotated by the cronjob. 
# Be aware that this log type is a performance killer. 
# As of 5.1 you can enable the log at runtime! 
#general_log_file  = /var/log/mysql/mysql.log 
#general_log    = 1 
# 
# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf. 
# 
# Here you can see queries with especially long duration 
#log_slow_queries = /var/log/mysql/mysql-slow.log 
#long_query_time = 2 
#log-queries-not-using-indexes 
# 
# The following can be used as easy to replay backup logs or for replication. 
# note: if you are setting up a replication slave, see README.Debian about 
#  other settings you may need to change. 
#server-id  = 1 
#log_bin   = /var/log/mysql/mysql-bin.log 
expire_logs_days = 10 
max_binlog_size   = 100M 
#binlog_do_db  = include_database_name 
#binlog_ignore_db = include_database_name 
# 
# * InnoDB 
# 
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. 
# Read the manual for more InnoDB related options. There are many! 
# 
# * Security Features 
# 
# Read the manual, too, if you want chroot! 
# chroot = /var/lib/mysql/ 
# 
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca". 
# 
# ssl-ca=/etc/mysql/cacert.pem 
# ssl-cert=/etc/mysql/server-cert.pem 
# ssl-key=/etc/mysql/server-key.pem 

innodb_buffer_pool_size=1024M 

[mysqldump] 
quick 
quote-names 
max_allowed_packet = 16M 

[mysql] 
#no-auto-rehash # faster start of mysql but no tab completition 

[isamchk] 
key_buffer  = 16M 

# 
# * IMPORTANT: Additional settings that can override those from this file! 
# The files must end with '.cnf', otherwise they'll be ignored. 
# 
!includedir /etc/mysql/conf.d/ 

Answer 1

您正在運行到超時問題和太多的連接。嘗試降低您的wait_timeout，也許是interactive_timeout。

我不知道你是否正在使用PDO（從我在這裏看到的所有帖子推薦），但嘗試使MySQL連接是一個持久化的連接，以便它不必保持打開新的連接每次更新。

Answer 2

這幾個MariaDB的安裝工作對我來說：

第1步 - 編輯的sysctl：

sudo vim /etc/sysctl.conf

第2步 - 粘貼這些行：

net.ipv4.tcp_tw_reuse=1 net.ipv4.tcp_tw_recycle=1 net.ipv4.tcp_fin_timeout=30 net.ipv4.tcp_max_syn_backlog=8192

基本上這將保持連接長時間打開

第3步：應用設置

sudo sysctl -p

這應該可以解決這個問題。