pt 2430pc

Note: This article from the real production case, thank the Netizen small dolphin to provide, I have to reproduce the fault check.SceneIn order to tidy up the line of independent table space fragmentation, so the use of Pt-online-schema-change in the slave from the Library, the purpose is to avoid affecting the main Library CPU, maintain a master-slave switchover, and then shrink the table space fragmentation on the main library. Slave commands execu

The width of a 10 pt font is required for a webpage today. After thinking about it for a long time, I did not calculate it. I checked the information and finally calculated it. by the way, let's take a look at the pt ps and DPI concepts: PT: in the printed layout, "point" is an absolute unit. It is equal to 1/72 inch. It can be measured by a ruler in a physica

PX,DP,SP,PT analysis and conversion of common unit of measurement in New ui---Reprint Please indicate source: Coder-pig, welcome reprint, do not use for commercial use!Piglet Android Development Exchange Group has been established, welcome everyone to join, both novice, rookie, Big God can, piglet a person'sStrength is limited after all, the writing out of things will certainly have a lot of flaws, welcome to point out, brainstorm, let the pig's blogM

HTML Font Size setting unit pt differs from PX Font size of the set units, commonly used in 2 kinds: px, pt.Basic concepts:px:pixel, pixel, the smallest unit displayed on the screen, for web design, intuitive and convenient;PT:Point, a standard unit of length, 1pt=1/72 inch, for printing, very simple to use;em: that is,%, in CSS, 1em=100%, is a ratio that combines CSS inheritance relationships with flexibility.PPI (DPI): Pixel (dot) per inch, th

css px,pt,em, REM, percent difference and usage px that is, the average domestic website uses more , The default size is 16px; PT Printing Industry common units em relative units, relative units of parent element properties rem The advantages of combining relative positioning and absolute positioning, relative to the root element html html size is ok conversi

, thread cache and so on to enhance the IO, we are relatively easy to get his memory, hit rate, the number of files, but it is not intuitive to know exactly how much data it read and write to the physical IO device.Ioprofile is a tool that provides intuitive quantitative data to describe the real-world read and write volume of a process to an IO device.Because the implementation is injected into the thread using Strace, sudo is required at run time, as in this way:sudo./

layout, point is an absolute value, which is equal to 1/72 inches, which can be measured by a ruler, in physical inches. But in CSS the meaning of PT is not so. Because our display is divided into pixels, a single pixel can only have one color (in order to simplify, the sub-pixel anti-aliasing technique is not discussed here), to display on the screen, you must first convert the length in PT to the length

You can also use the pt-slave-restart command of percona-toolkit to handle abnormal shutdown of MySQLSlave (pt-slave-restart. The percona-toolkit-2.2.8-1.noarch.rpm needs to install some dependency packages. Yum install perl-DBI perl-DBD-MySQL perl-IO-Socket-SSL perl-Time-HiRes Handle abnormal shutdown simulation 1. JAVA programs are constantly writing to the Master Import java. SQL. Connection ;

The tutorial jQuery was created by John Resig, an American. It has attracted many javascript experts from around the world to join the team, including Jörn Zaefferer from Germany, stefan Petre from Romania.JQuery is another excellent Javascr into pt framework after prototype. Its purpose is to write less, do more, write less code, and do more.It is a lightweight js Library (only 21 k after compression), which is not suitable for other js libraries. It

The binlog parsing tool is widely used. mysqlbinlog is the most commonly used tool. It has its own merits. For DBA, this article only introduces pt-query-digest, which can be used to solve the problem. The binlog parsing tool is widely used. mysqlbinlog is the most commonly used tool. It has its own merits. For DBA, this article only introduces pt-query-digest, which can be used to solve the problem. T

Troubleshooting of abnormal shutdown of MySQLSlave (pt-slave-restart) Troubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart) The following three methods are used to handle abnormal shutdown of MySQL Slave.You can also use the pt-slave-restart command of percona-toolkit.The percona-toolkit-2.2.8-1.noarch.rpm needs to install some dependency pa

px\em\pt Unit IntroductionPX Pixel unit name is pixel, relative length unit, pixel (px) is a domestic recommendation relative to the display screen resolution;The EM unit name is the relative length unit. Compared to the font size of the text within the current object, foreign use more, here em and HTML The PT unit name is point, and the absolute length unit is generally the old version of table using the l

as the unit;3. Recalculate the EM values of the enlarged fonts. Avoid duplicate declarations of font size.This is to avoid the 1.2 * 1.2 = 1.44 phenomenon. For example, when you declare a font size of 1.2em in #content, you can only have 1em when you declare the font size of p, not 1.2em, because this em is not em, it becomes 1em=12px because it continues to #content the font height.However, 12px Kanji exception, is obtained by the above method 12px (1.2em) size of Chinese characters in IE does

MySQL performance profiling tool (pt-query-digest) This tool is also from percona-toolkitOther tools in this tool setTroubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart)Verify MySQL master-slave consistency (pt-table-checksum pt-table-sync)It can analyze various logs to analyze performance issuesIncl

CISCO PT Simulation Experiment (13) router RIP dynamic routing configurationExperimental Purpose :The configuration method of mastering RIP Dynamic route selection protocolMastering RIP routing descriptions in routing tablesFamiliar with the principle and process of Routing and Packet forwardingExperimental Background : The company is connected to the export router of the enterprise network through a three-layer switch, isp The other router of

CISCO PT Simulation Experiment (12) configuration of router static routesExperimental Purpose : Master the configuration method and application of static routeMastering Route descriptions in the routing tableFamiliar with the principle and process of Routing and Packet forwardingExperimental Background :In addition to the headquarters of a company, there is another branch, and there is a separate LAN, in order to enable the company's departments can

CISCO PT Simulation Experiment (16) Router redistribution configurationExperimental Purpose :Learn how to configure router redistributionLearn to see routes generated by routing redistribution learningExperimental Background :with the expansion of the company's network, the company installed a number of routers and run a variety of routing protocols, including the company 's export router R2 with a router outside the company R3 connection, three-layer

Pt-kill is a very simple tool to kill MySQL threads and queries. The main purpose is to prevent some long queries from consuming system resources for long periods of time, while affecting the online business. Main function: Get the connection that satisfies the condition from show processlist or read the connection that satisfies the condition from the file containing show processlist and print or kill or perform other actions.Our main use here is t

Objective: In general operations work often encounter such a scenario, the server's IO load is very high (util in iostat), but unable to quickly locate the IO load source process and source files resulting in the inability to make the appropriate policy to solve the problem. This phenomenon is more common on MySQL, and before 5.6 (Performance_schema provides IO instrument), we can usually only guess the high IO caused by MySQL, but we can't pinpoint which file is the load. For exampl

The pt novel system kills the version. Patch released officially! (Fuck !)Let's get started with the following text: Here is our own communication platform, a technology sharing platform for all our 90sec members!This set of program users do not use databases, and all user information is stored in the/data/user directory!Create a folder based on the user name and write user registration parameters and user information in the folder. 90sec-Web Informat