失去与MySQL的连接

我在Slackware下安装了Apache，mysqld。 Apache工作。 但脚本：

$dblocation="127.0.0.1"; $dbuser="root"; $dbpasswd="unfriendly_possum"; $dbcnx=mysql_connect($dblocation, $dbuser, $dbpasswd); if(!$dbcnx) { echo("Error"); exit(); } $dbq=mysql_query("select version();"); echo(mysql_result($dbq,0)); 

返回一个错误

 Warning: mysql_connect() [function.mysql-connect]: Lost connection to MySQL server at 'reading initial communication packet', system error: 111 in /usr/local/httpd/htdocs/mysql.php on line 8 Error 

帮助（我在哭）

UPD我已经更正$ dblocation =“127.0.0.1”到“本地主机”，但另一个错误发生：

• MySQL DB连接错误
• MySQL查询从表中select有效的域
• 在Solaris上重新启动MySQL
• 什么事情可能导致MySQL数据库恢复到以前的状态？
• MySQL陷入困境，吃掉磁盘I / O

 Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/run/mysql/mysql.sock' (2) in /usr/local/httpd/htdocs/mysql.php on line 8 Error 

PHPconfiguration片段

 [SQL] sql.safe_mode = Off [ODBC] ;odbc.default_db = Not yet implemented ;odbc.default_user = Not yet implemented ;odbc.default_pw = Not yet implemented ; Allow or prevent persistent links. odbc.allow_persistent = On ; Check that a connection is still valid before reuse. odbc.check_persistent = On ; Maximum number of persistent links. -1 means no limit. odbc.max_persistent = -1 ; Maximum number of links (persistent + non-persistent). -1 means no limit. odbc.max_links = -1 ; Handling of LONG fields. Returns number of bytes to variables. 0 means ; passthru. odbc.defaultlrl = 4096 ; Handling of binary data. 0 means passthru, 1 return as is, 2 convert to char. ; See the documentation on odbc_binmode and odbc_longreadlen for an explanation ; of uodbc.defaultlrl and uodbc.defaultbinmode odbc.defaultbinmode = 1 [MySQL] ; Allow or prevent persistent links. mysql.allow_persistent = On ; Maximum number of persistent links. -1 means no limit. mysql.max_persistent = -1 ; Maximum number of links (persistent + non-persistent). -1 means no limit. mysql.max_links = -1 ; Default port number for mysql_connect(). If unset, mysql_connect() will use ; the $MYSQL_TCP_PORT or the mysql-tcp entry in /etc/services or the ; compile-time value defined MYSQL_PORT (in that order). Win32 will only look ; at MYSQL_PORT. mysql.default_port = ; Default socket name for local MySQL connects. If empty, uses the built-in ; MySQL defaults. mysql.default_socket = ; Default host for mysql_connect() (doesn't apply in safe mode). mysql.default_host = ; Default user for mysql_connect() (doesn't apply in safe mode). mysql.default_user = ; Default password for mysql_connect() (doesn't apply in safe mode). ; Note that this is generally a *bad* idea to store passwords in this file. ; *Any* user with PHP access can run 'echo get_cfg_var("mysql.default_password") ; and reveal this password! And of course, any users with read access to this ; file will be able to reveal the password as well. mysql.default_password = ; Maximum time (in seconds) for connect timeout. -1 means no limit mysql.connect_timeout = 60 ; Trace mode. When trace_mode is active (=On), warnings for table/index scans and ; SQL-Errors will be displayed. mysql.trace_mode = Off [MySQLi] ; Maximum number of links. -1 means no limit. mysqli.max_links = -1 ; Default port number for mysqli_connect(). If unset, mysqli_connect() will use ; the $MYSQL_TCP_PORT or the mysql-tcp entry in /etc/services or the ; compile-time value defined MYSQL_PORT (in that order). Win32 will only look ; at MYSQL_PORT. mysqli.default_port = 3306 ; Default socket name for local MySQL connects. If empty, uses the built-in ; MySQL defaults. mysqli.default_socket = ; Default host for mysql_connect() (doesn't apply in safe mode). mysqli.default_host = ; Default user for mysql_connect() (doesn't apply in safe mode). mysqli.default_user = ; Default password for mysqli_connect() (doesn't apply in safe mode). ; Note that this is generally a *bad* idea to store passwords in this file. ; *Any* user with PHP access can run 'echo get_cfg_var("mysqli.default_pw") ; and reveal this password! And of course, any users with read access to this ; file will be able to reveal the password as well. mysqli.default_pw = ; Allow or prevent reconnect mysqli.reconnect = Off [mSQL] ; Allow or prevent persistent links. msql.allow_persistent = On ; Maximum number of persistent links. -1 means no limit. msql.max_persistent = -1 ; Maximum number of links (persistent+non persistent). -1 means no limit. msql.max_links = -1 

my.cnf部分：

 [mysqld] log =/var/log/mysqld/mysqld.log port = 3306 socket = /tmp/mysql.sock skip-locking key_buffer = 16M max_allowed_packet = 1M table_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K 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! # #skip-networking # Disable Federated by default skip-federated # Replication Master Server (default) # binary logging is required for replication 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 = /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 # Uncomment the following if you are using InnoDB tables #innodb_data_home_dir = /usr/local/mysql/var/ #innodb_data_file_path = ibdata1:10M:autoextend #innodb_log_group_home_dir = /usr/local/mysql/var/ #innodb_log_arch_dir = /usr/local/mysql/var/ # 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 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates 

 socket = /tmp/mysql.sock 

 socket = /var/run/mysql/mysql.sock 

 $dblocation="localhost"; 

 mysql.default_socket = 

 mysql.default_socket = /tmp/mysql.sock 

 Lost connection to MySQL server at 'reading initial communication packet', system error: 111