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Basic tutorials for installing and using Percona-toolkit to assist in operating Mysql _mysql

. Dropping old table ... Dropped old table ' test '. ' _oss_pvinfo2_old ' OK. Dropping triggers ... Dropped triggers OK. Successfully altered ' test '. ' Oss_pvinfo2 '. In an example, a large table adds a field, and the statement reads as follows: Pt-online-schema-change--user=root--password=zhang@123--host=localhost--lock-wait-time=120--alter= "ADD COLUMN domain_id INT "D=test,t=oss_pvinfo2--

CentOS using the MySQL tool Percona Toolkit

'. ' _wwek_users_new ' OK.2015-09-18t10:56:16 Creating triggers ...2015-09-18t10:56:16 Created triggers OK.2015-09-18t10:56:16 copying approximately 183066 rows ...Copying ' Wwek '. ' wwek_users ': 30% 01:10 remainCopying ' Wwek '. ' wwek_users ': 49% 01:01 remainCopying ' Wwek '. ' wwek_users ': 63% 00:51 remainCopying ' Wwek '. ' wwek_users ': 76% 00:37 remainCopying ' Wwek '. ' wwek_users ': 88% 00:20 remain2015-09-18t10:59:03 Copied rows OK.2015-09-18T10:59:03 Swapping tables ...2015-09-18T

Flash drag-and-drop command detailed introduction

parameters are used to control the moving range of the dragged object.2. Stop dragging and dropping commands to explainCommand format: A dragged movie clip instance name. Stopdrag ()This allows you to stop dragging and dropping objects.Second, the example explanationHere's a simple example of an experimental drag-and-drop command.Operation Steps:1, create a new flash document, and draw a circle on the stag

Related concepts and explanations of UBI

device [Dev]-show or set current deviceNAND read-addr off|partition SizeNAND write-addr off|partition SizeRead/write ' size ' bytes starting at offset ' off 'To/from memory address ' addr ' and skipping bad blocks.NAND read.raw-addr Off|partition [Count]NAND write.raw-addr Off|partition [Count]Use Read.raw/write.raw to avoid ECC and access the Flash as-is.NAND write.trimffs-addr off|partition SizeWrite ' size ' bytes starting at offset ' off ' to memory address' addr ', skipping blocks and

How to use MySQL pt-online-schema-change tools

Update_foreign_keys, 1 Altering ' houyi '. ' ga ' ... Creating new Table ... Created new Table Houyi._ga_new OK. Altering new Table ... Altered ' Houyi '. ' _ga_new ' OK. Creating triggers ... Created triggers OK. Copying approximately 746279 rows ... Copied rows OK. Swapping tables ... swapped original and new tables OK. Dropping old table ... Dropped old table ' Houyi '. ' _ga_old ' OK. Dropping

Using FEC to improve UDP (RTP) audio and video transmission effects _ audio and video codec

is for C + + development, provide PC, Android (JNI), iOS cross-platform support. To facilitate the testing, we developed a few simple test demos under the PC to validate the demo. (A) Data validation Demo The following illustration shows the data validation demo interface, which takes the specified data as a test source to help the user better understand the processing process. Figure 2 Data Flow Verification Demo The test tools are point-to-point mode, can be run on both PCs (also support sta

Pl/sql Developer 6.02 released

could also de Lete adjacent highlighted text dropping a Java source from the Object Browser would cause ORA-29501 pl/sql beautifier Not format ' all ANSI join types correctly on Oracle7 Explain ' and Test function did not replace pl/sql variables by bin D Variables Text importer would only import to records when pasting to clipboard Data generator did not handle a master With 2 details correct uxtheme related errors fixed Browser Folders would no sav

Java visual programming and beans

, because they usually show some types of visual components, such as a TextField or a. In fact, visualization typically shows that a component can access a running program with great precision. So part of the visual programming method consists of dragging and dropping a component from a palette and putting it into our form. The application Creation tool writes the program code as we do, which causes the components in the running program to be created.

Options for the summary of Mysql sub-differentiated tables

tableFrom the mysql5.1, a table of partition engines was provided to see In effect, different portions of a table is stored as separate tables in different locations.In fact, each part of a table can be stored in a separate individual table in a different location (slightly crappy) In my understanding, is it more beneficial to read a whole table if it is partitioned on different disk locations? Partitioning table pros and consHere is the main reading of the MySQL manual, I also

MySQL table space set

tablespace.5. Restart the server.6. Import theDumpFiles.2. Another official note, File-per-table's advantage, also points out that the space of the Ibdata file can only be reused, but cannot be released to the operating system. you can reclaim operating system disk spacewhen truncating or dropping a table . for tables created when file - per- table mode is turned off , truncating or dropping the t

Tutorial: Writing Transact-SQL statements

are supplied by toggling the position of ProductID and ProductName in the field list (in parentheses) and in the list of values. Copy Code--changing the order of the columns INSERT dbo. Products (ProductName, ProductID, Price, ProductDescription) VALUES (' screwdriver ', ' 3.17 ', ' Flat head ') G O The following statement shows that the name of the column is optional, as long as the values are listed in the correct order. This syntax is common, but it is not recommended because it may be

GPS Debug Record

GPS Debug Record: 1, access to GPS data is not complete, log information as follows: W/locationmanagerservice (392): Dropping incomplete Location:location[gps 22.563652,113.866384 acc=??? t=?!? et=+3m15s512ms alt=128.724 W/locationmanagerservice (392): Dropping incomplete Location:location[gps 22.563652,113.866384 acc=??? t=?!? Et=+3m15s514ms alt=128.724 This is because the GPS data in Android 4.2 to make a

Android Performance Optimization Model

60fps required for a smooth screen, which means that most of the program's operations must be done within 16ms in order to achieve 60fps.If one of your operations takes time of 24MS, the system will not be able to render normally when the vsync signal is received, so there is a drop frame phenomenon. Then the user will see the same frame in 32ms.It is easy for users to perceive that the lag is not smooth when the UI is performing animations or sliding the ListView, because the operation is rela

Android Performance Optimization Model

operation is relatively complex and the phenomenon of dropping frames is prone to lag. There are a number of reasons for dropping frames, perhaps because your layout is too complex to render within 16ms, possibly because there are too many drawing units stacked on your UI, and possibly because the animations have been executed too often. These can cause CPU or GPU overloading.There are tools that can be us

Ubuntu Forgot login password

shell prompt" option, and then press Enter. At this time, a command prompt cursor is displayed on the screen. You can enter any command here, including changing the password. However, if passwd The system prompts "authorization token manipulation error ". I searched the internet for the reason that when the above recovery mode directly enters the root, the entire file system will be read-only mounted (dropping into a root shell from the boot loa

Practices of the FlashbackDrop flash deletion function of Oracle

The FlashbackDrop flash-back deletion function of Oracle provides a convenient Recovery Method for table deletion by mistake. The principle of this function is Oracle's ldquo and the recycle bin rdqu. The Flashback Drop flash-back deletion function of Oracle provides a convenient Recovery Method for dropping tables by mistake. The principle of this function is Oracle's ldquo and the recycle bin rdqu. The Flashback Drop flash-back deletion functio

Big integer algorithm [05] shift operation, integer 05

Big integer algorithm [05] shift operation, integer 05 In the previous blog post, we talked about operations related to the entire number of digits. This time the content is still related to bit operations: shift operations. It should be noted that the big integer shift operation mentioned here is arithmetic shift (the accuracy will increase if the Left shift is used, rather than dropping the removed bit ). ★Differences between the two types of Shift

15 Android performance Optimization models released by Google

60fps required for a smooth screen, which means that most of the program's operations must be done within 16ms in order to achieve 60fps.If one of your operations takes time of 24MS, the system will not be able to render normally when the vsync signal is received, so there is a drop frame phenomenon. Then the user will see the same frame in 32ms.It is easy for users to perceive that the lag is not smooth when the UI is performing animations or sliding the ListView, because the operation is rela

Oracle Tablespace management Tablespace & amp; Data Files

Data dictionary when dropping) 4. Test the preceding three points: www.2cto.com ①. create tablespace shanxi datafile '/u01/app/oracle/product/10.2.0/oradata/oamis/shanxi. dbf 'size 20 m extent management local uniform size 128 k; ② create a user. The default tablespace is shanxi create user fc identified by fc default tablespace shanxi ③. grant permissions to connect, resource to fc; ④. log on to conn fc/fc @ oamis; ⑤ create a table and add a record

Install and configure OracleDatabaseControl using emca on the command line interface

@db001 ~]$ emca -repos recreate;STARTED EMCA at Jul 10, 2014 4:18:24 PMEM Configuration Assistant, Version 11.2.0.0.2 ProductionCopyright (c) 2003, 2005, Oracle. All rights reserved.Enter the following information:Database SID: xgdbListener port number: 1521Password for SYS user:Password for SYSMAN user:Password for SYSMAN user:Do you wish to continue? [yes(Y)/no(N)]: yJul 10, 2014 4:18:37 PM oracle.sysman.emcp.EMConfig performINFO: This operation is being logged at /oracle/cfgtoollogs/emca/xgd

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