pt 2430pc

Recently asked by a friend: CSS set a DOM height:65px, is the height of the display and Android 65DP elements such as high? The brain flashed a bunch of concepts, such as DPR,PPI,DP,PT, but thought for a while, paste, so re-combed the relevant knowledge, in case of a rainy day.1.ppiThe PPI refers to pixels per inch, which is the pixel point of the pixel, where the pixels are the physical pixels (i.e. the smallest display unit). The PPI describes the p

MySQL online modify table structure Pt-oscIt is known that MySQL is more expensive than the DDL operation. Because MySQL blocks any read and write operations while modifying the table.Basically the business is paralyzed. This is not tolerated if the volume of data is large and may take several hours to complete. Percona developed a series of Tools Percona Toolkit package, which has a tool pt-online-schema-c

A good tool for connecting to killMySQL is part of perconatoolkit. when there are many idle connections, the maximum number of connections is exceeded, and a problematic SQL statement causes high mysql load, you need to kill some connections. This tool is mainly used for pt-kill. it is an excellent tool for kill MySQL connections and is part of percona toolkit, when the maximum number of connections is exceeded due to a large number of idle connection

html px em pt length unit (pixel relative length point) knowledge ChapterHTML PX EM pt unit area (music mattress)DirectoryRecognize 3 unitsHTML Unit Case ComparisonUnit conversionsEM Unit IntroductionRecommended units px (pixels)About PX PT EM Summary UnitFirst, px\em\pt unit introduction-TOP (music mattress)PX unit na

Reference article:Http://ourmysql.com/archives/1359?utm_source=tuicoolutm_medium=referralOfficial: Https://github.com/box/AnemometerSingle-node anemometer monitoring1 Installing Anemometer# cd/data/www/web3# git clone https://github.com/box/Anemometer.gitanemometer CD anemometer2 Creating tables and user names# mysql-uroot-proot We can look at the following table structure as follows650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/82/C2/wKioL1dgsumQ5XJvAABppErvjtI393.png "style=" floa

PS and PT combine mice to paint beautiful New Year illustrations The course introduces the beautiful rabbit figure illustrator of the mouse painting method. The author of the mouse painted very fine, the characters of the high light and color rendering of very beautiful. Mouse painting does not have much skill, the key is the individual to detail and overall grasp.Final effect1, first we open painter sketch, new canvas size is 2480*3425 pixel. Genera

The length unit mainly has the following kinds of EM ex ch REM VW VH vm cm mm in pt pc px%, presumably can be divided into several "absolute units" and "relative units" and "percent units". Absolute unit: px in cm mm Relative unit: EM rem pt PC EX CH Percent unit: VW VH VM% The following mainly say a few commonly used units PX: Absolute Unit, page by ex

, then there are ways to avoid:The passive processing : Modify the Delayed monitoring method, found that the problem of timely processing.2--Proactive Prevention : set--master-retry-count,--master-connect-retry,--slave-net-timeout copy retry parameters correctly. 1--passive processing NBSP;MYSQL Latency monitoring most direct capture show The seconds_behind_master in slave status. Then, as mentioned above, Seconds_behind_master cannot be used to really measure replication latency between

-dbd-mysqlPercona-toolkit-2.2.18.tar.gzMake make installGRANT SELECT, PROCESS, SUPER, REPLICATION slave,create,delete,insert,update on * * to ' USER ' @ ' master_host ' identified by ' PASSWORD ';SELECT concat (' DROP TABLE IF EXISTS ', table_name, '; ') From Information_schema.tables WHERE table_schema= ' xx 'GRANT SELECT, PROCESS, SUPER, REPLICATION SLAVE on * * to ' checksums ' @ ' Masterip ' identified by ' xx ';Grant all on test.* to ' checksums ' @ ' Masterip ' identified by ' xx ';Ptdebu

I want to use php to build a pt site. The communication between php and pt client has never been used. Can someone tell me? Currently, the open source software nexusphp is available for reference, but the source code looks very little at it. Where can we get this opposite knowledge (ptnexusphp )? I want to use php to build a pt site. The communication between php

Pt-kill is an excellent tool for connecting to killMySQL. it is part of perconatoolkit. when many idle connections cause the maximum number of connections to be exceeded and a problematic SQL statement causes high mysql load, all of them need to kill some connections. This tool is mainly because pt-kill is an excellent tool for kill MySQL connections and is part of percona toolkit, when the maximum number o

0x00 background PT is the abbreviation of PrivateTracker (Private seed server). It can collect statistics on user uploads and downloads. User Sharing rate. You can simply understand it as an upgraded version of BT. Only when the shared rate is set can the account not be deleted. PT is actually a type of Bt download, but there are two obvious improvements: first, private Secret for small-scale download. Seco

Introduction when the MySQL server has a short (5-30 seconds) performance fluctuations, the general performance monitoring tools are difficult to grasp the fault site, it is difficult to collect the corresponding more granular diagnostic information. In addition, if the frequency of such fluctuations is very low, such as in a few days, we are also difficult to artificially seize the scene, collect data. This is the problem that Pt-stalk solves.Paramet

Pt-Online-schema-change of MySQL online DDL Tool MySQL DDL:DDL is a feature that makes all MySQL ddbas criticized, because in MySQL, when dDDL is performed on a table, it locks the table. When the table is small, such as less than 1 W rows, it has little impact on the front-end, if tens of millions of tables are encountered at that time, the front-end application's write operations on the tables will be affected! The InnoDB engine uses the following s

The DB table structure of a company's business because of the constantly changing requirements, the table structure needs to be modified as the requirements change, changing the field type, adding fields. The most bitter force is that two of the main tables are particularly large, a 5000W or more, the other one more scary to reach more than 100 million. Used to be partitioned, followed by Given that the partitioning field has no practical significance, the advantages of partitioning have not be

pt-heartbeat Principle ResearchFirst, IntroductionMysql Seconds_behind_masterparameters are not accurate for master-slave delay measurements because his statistics are based onslave Sqlthreadand theI/O threadthe time difference, ifI/O threadbeNetwork Impact, this valuation is very inaccurate. More accurate master-slave delay detection is generally usedpt-heartbeat. pt-heartbeatdivided into two partsthe fir

In the implementation of the printing function, encountered a problem, using PX as a unit on different machines or printers printed on the font size is not the same, so after the query, found that using PT units can be used for logistics adaptation, the following is the conversion between units:There are three common units for defining font size, px, EM, PTPxPX is a pixel abbreviation and is a pixel-based unit. In the process of browsing the web, the

in CSS, the units of measure are divided into two types:Relative Unit: px/em/ex/%Absolute unit: CM/PT/IN/PC/MMspecific explanations of these unitsPxRelative length units. Pixels (Pixel).Pixels are relative to the display screen resolution. For example, the resolution used by wondows users is typically 96 pixels per inch. The resolution used by Mac users is typically 72 pixels per inch.EmRelative length units. The font size relative to the text within

Pt-query-digestPt-query-digest can parse queries from common MySQL logs, slow query logs, and binary logs, even from the tcpdump of show Processlist and MySQL protocols, if no files are specified, It reads data from the standard input stream (STDIN).The simplest usage is as follows:Pt-query-digest Slow.logsThe output information is roughly as follows:The entire output is divided into three parts:1. Overall overview (Overall)This section is a general o

To copy related files:Master.info: The information needed to save a link from the server to the primary server, one value per lineRelay-log.info: Text file, save copy location, including files and locations for binary and relay logs For the security of replication: Sync_master_info = 1Sync_relay_log = 1Sync_relay_log_info = 1On-line based statement replication:Based on statement:Small amount of data, easy to view, practical and strongSome statements cannot be duplicated precisely: the applicat