m2m connections

Too many MySQL database connections cause system errors and the system cannot connect to the database. The key lies in two data points:1. Maximum number of connections allowed by the database system max_connections. This parameter can be set. If this parameter is not set, the default value is 100. The maximum value is 16384.2. The current number of connection threads in the database is threads_connected. Th

Remote Desktop Users may often encounter the problem of "exceeding the maximum number of allowed connections", because the default setting of Remote Desktop for administrator is two connections, in addition, If you disable remote desktop without logging off after remote logon, the session is actually still on the server side, so the above prompt is easily displayed when you connect again. Solution 1: Use lo

A company's server uses the default Tomcat 6 configuration, and the server is scrapped after a full click in the background. If you check the configuration, the default permsize value is too small (16-64) Tomcat_home/bin/Catalina. Sh Add a row: java_opts = "-XX: permsize = 64 m-XX: maxpermsize = 128 M" Solve the problem (possibly because too many jar packages are called). The following are some settings on the Internet. Java_opts = "-server-xms800m-xmx800m-XX: permsize = 64 m-XX: maxnewsize = 25

The comet model hosts maintain persistent connections, and the number of connections to a single host can reach one million (currently, the maximum number of connections to a single host can reach about 0.6 million ), netstat does not respond for a long time when calculating the network connection status, but the SS command statistics are relatively fast, but the

$ Mysql-uroot Error 1040 (00000): Too connector connections The above error is probably encountered by many people. aurimas mikalauskas has mentioned a solution in the MySQL performance blog (with caution in the production environment ): $ GDB-p $ (cat data/mysql_sandbox5087.pid )\-Ex "set max_connections = 5000"-BatchThe above mentioned is only a fire-fighting method. MySQL provides another method to avoid the above problems to a certain ext

If it is started using Catalina. Sh (Linux) or Catalina. BAT (WIN:Modify the two files and add the following sentence:Set catalina_opts =-xms64m-xmx128m If you use the WINNT service to start:Open C:/winnt/system32/regedt32.exe and go to HKEY_LOCAL_MACHINE --> Software --> Apache Software Foundation --> process runner 1.0 --> tomcat5 --> ParametersModify attributes:-Xms64m-Xmx128m It is recommended that the value of XMS is the same as that of xmx, which can speed up memory recovery. Increase T

found a lot of students in use. NET is concerned with a problem when it comes to communication. NET can support how many online connections. In fact, the communication of. NET is supported by WinSocket, and since the low-level winsocket supports that, the limit of the number of access connections to the. NET end is fully limited by the WinSocket current operating system. 65535 of the limit? Ma

First step, on the cmd command line, enter SqlplusStep two, follow the prompts to enter the user name and password1. View processes and Sessions parametersSql> Show parameter processesNAME TYPE VALUEDb_writer_processes Integer 1Gcs_server_processes integer 0Job_queue_processes Integer 10Log_archive_max_processes Integer 2Processes integer 50Sql> Show Parameter SessionsNAME TYPE VALUELicense_max_sessions integer 0license_sessions_warning integer 0Logmnr_max_persistent_sessions Integer 1Sessions I

1. usage : When ln [option] source_file dist_file-f is established, it will be deleted with the file name. -I ask before deleting. LN-S ABC CDE establishes the soft connection of ABC, LN ABC CDE establishes the hard connection of ABC,2. The difference between soft links and hard links (popular): Hard links can be considered as a file with two filenames, whereas a soft link is a system that creates a new linked file pointing to the file it refers to3. The difference between soft links and h

After MySQL is installed, there are many parameters that need tuning. Almost all of the content involved in tuning can be set up in the My.cnf file. The number of MySQL connections is also one of the more important tuning parameters. MySQL's default maximum connection number is 100, for large load of concurrent requirements is not enough, then you can modify the MySQL maximum number of connections. 1, view

connection is called "persistent." To ensure that your system does not appear too many connections errors, you need to be aware of two points: 1. Ensure that your Apache maximum number of processes does not exceed the maximum number of MySQL connections; 2. Do not use too many mysql_pconnect in the program to connect to the same database server (one is enough). This requires good coding habits and specifi

Remove all network connections that are already open: net use */dTo open a network connection using a command: NET use //192.168.0.29/user:administrator The following are all reference documents for the net use command (excerpted from Windows Help) net useConnect a computer to a shared resource or disconnect it, or display information about a computer connection. This command also controls persistent network con