pt 2430pc

 PT (Point, LB): is a unit of physical length that refers to an inch of 72 points. px (pixel, pixels): is a virtual length unit, is the digital image length unit of the computer system, if PX to be converted to physical length, you need to specify the accuracy dpi (Dots per inch, pixels per inch), when scanning printing generally have dpi optional. Windows system By default is 96dpi,apple system default is 72dpi. em (relative length units, relative

Basic configuration of the Cisco PT Simulation Experiment (10) routerExperimental Purpose :Mastering several common configuration methods of routersFamiliar with different command line operation modes of routersBasic configuration commands for the Palm-lift routerExperimental Background : as a network administrator, you first in the equipment room to the router after the first configuration, I hope in the future in the office or on business can also b

CISCO PT Simulation Experiment (9) Inter-VLAN routing for layer three switchesExperimental Purpose : Mastering the configuration of the switch Tag VLANMastering the configuration method of three-layer switch VLAN routingInter-VLAN communication via three-layer switchExperimental Background :The Company's finance department and sales department are in different offices, in order to secure and facilitate management of the two departments of the host VLA

Pt-kill Common Kill process parameters1. Press User Kill/usr/bin/pt-kill--busy-time--match-user= "dbUSER1 | DbUSER2,... "--victim all--interval 1--kill--daemonize--pid=/tmp/ptkill.pid--print--log=/home/pt-kill.logNote: Test by user to kill thread, note--match-user between multiple users | Separated.2. Press query to source host kill/usr/bin/

Percona utility-Introduction to pt-kill, perconapt-kill Pt-kill is an excellent tool for kill MySQL connection and is part of percona toolkit, when the maximum number of connections is exceeded due to a large number of idle connections and a problematic SQL statement causes a high mysql load, you must kill some connections. This tool is mainly used for this purpose. This tool is highly practical at work to

Pt-pmp, mysqlptpmp Pt-pmp has two functions: Obtain the stack information of a process, and summarize the stack information. The stack information of a process is obtained using gdb. Therefore, the performance of the mysql server may be affected during the process. In official words: This will freeze the program for some period of time, ranging from a second or so to much longer on very busy systems with a

When you modify a schema by using the Pt-online-schema-change tool, a new table with the same structure as the original data table is created, and the data from the original table is progressively copied to the new table.For example, a ZS table with Id,name data columns, when adding a new column named UID to the table, use the following command:Root@localhost: Mysql3316.sock -: -: - [Test]>ShowCreate TableZs\g*************************** 1. Row********

We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table on the master database using timestamps, then, read the updated timestamp from the database and compare it with the local system time to monitor the # code/5799.html "target =" _ blank "> master/slave replication latency of the MySQL database, we can use

We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table on the master database using timestamps, then read the updated timestamp from the database and compare it with the local system time to monitor the https://www.php1.cn/code/5799.html "target =" _ blank "> MySQL database master/slave replication latency,

Tags: filter rowltemitstat Ignore eachinnodb return ##====================================== ===============## pt-osc Workflow: 1, check if the change table has a primary key or a unique index, whether there is a trigger Span style= "FONT-SIZE:14PX; Font-family: ' Courier New ', courier; >2, check the table structure of the modified table, create a temporary table, execute the ALTER TABLE statement on the new table 3, create three trigger

Cisco PT Simulation Experiment (5) port aggregation configuration for switchesExperimental Purpose :Understanding Port Aggregation FundamentalsMaster the configuration method of general switch port aggregationExperimental Background : The company's finance department and the sales department of the PC through 2 switches to communicate frequently, in order to improve the bandwidth between links, to ensure the reliability of network communications, whil

It is said that the Pt-online-schema-change in the Pt-toolkit toolset can modify the table structure on-line without locking the table, so what is the specific principle of this tool, please see below to explain:Restrictions on the use of 1.pt-online-schema-change tools:1) If the modified table has a foreign key, the tool will not execute unless a specific value

In CSS style sheets, we often see such units of length such as PT, Px,em,ex,in, and so on. What do they mean, what's the difference?In CSS style sheets, the length units are divided into two types: Relative length units, such as PX, EM, etc. Absolute length units, such as PT,MM, etc. also talk about the difference between PX and PTOften see the PX and