? Setting up SQL Plan management? Set up various SQL plan management scenarios
SQL Plan Management: Overview
? SQL Plan management is an automatic control of the evolution of SQL planning. The optimizer can automatically manage the SQL plan baselines. – Use only known and validated plans.? The scheduled changes are automatically validated. – Continue to use comparable or better plans only. SQL
better platform for developers, enterprises and consumers ."
Developers can now download Android 2.2sdk, Android ndk, and revision 4 from the android developer website. Google will provide froyo to OEMs and open-source communities in the coming weeks.
1. Speed improvement
When Google introduced Android 2.2, it put speed first. Google added just-in-time (JIT) in 2.2 to increase the running speed by 2-5 times. The number of Nexus One game frames running in 2.1 is 29, and 2.2 is 41.
2. Added e
Preparations:1) Check the phone is root, because the phone needs to execute the su command to modify the Phone gateway, so must root, if there is no root reference (Nexus S 4.1.1) This address: http://www.teamandroid.com/2012/07/20/root-nexus-s-on-android-411-jelly-bean-jro03e-official-software-update/2) install the terminal and busybox on the mobile phone through the market.
Step 1: System Setting-> wireless networks-> more-> tethering portables
Kivy a to Z -- a simple tool for synchronizing Android system files through adb
When I was interested, I wrote some Kivy code, but debugging was not very convenient. The method of directly logging to public.mp3 is too complicated, and file sharing software finds that there is no easy-to-use method,
The use of samba filesharing is also slow, but the updated version has always prompted that no tethering is available for wifi, which means that no
-device messaging API allows users to push various messages to Android phones. The demonstration of pushing navigation information to Nexus One was also conducted. In addition, 2.2 has been added to the rumored tethering (network sharing) service, and there has also been a painting of the iPad using the Android mobile phone tethering to access the Internet.4. browser upgradeGoogle said that Android 2.2's bu
we cocould officially claim hid isSupported by the platform. For example we need to plumb the plugin APIUp in the android Java framework. And the android framework needs betterSupport for HID input methods-New keymaps and mouse support. We doNot yet have a release targetted for official hid support.
Q. What is the status for tethering-Dun and pan.A. Similar to hid, some very early work is in cupcake. bluez has Dun andPan daemons which we compile.Exte
added to the rumored tethering (network sharing) service, and there have been pictures of iPad surfing the Internet using Android mobile phone tethering..
4. browser upgrade
Google called Android2.2 The built-in browser is the fastest mobile browser in the world, improving JavaScript performance by 2-3 times. At the same time, the Google map positioning function can also be enabled in the browserNew brow
evolution of SQL plans by maintaining so-called "SQL Plan Baseline (11g)". When this feature is enabled, this integration can be done as long as it proves that the newly generated SQL plan integrates with the SQL plan baseline without causing performance regressions. Therefore, when you execute an SQL statement, you can only use the plan that is included in the corresponding SQL plan baseline. SQL plan baselines can be automatically loaded or implant
Iphone5 share the network to the Mac notebook to the specific procedures:1. Open Iphone5 Network sharing. Click on the iphone5 on the MyWi icon, in the interface of the downward flip, you will see a "tethering" section, which has a "USB and Bluetooth" option, the right side of the slider to the right to complete the network sharing function open.2. Connect the iphone to the computer with a data cable.3. Create a computer-side USB network connection. O
the context of the new user.
However, in the process cache, not only the two are available.
1. Compiled plans
2. Execution Context
3. cursor
4. lexical analysis tree
(If you are interested in these four items, you can refer to "SQL Server survival cheats" chr4.1.
Regarding the reuse of execution context, the SQL Server survival tips are not very clear or I have not understood what it means.
The following are the execution context issues mentioned in
my opinion of preparing lesson and teaching plan
1. The relationship between preparing lessons and writing lesson plans
The concept of "lesson preparation" and "lesson plan" have long existed the different connotation and extension of the broad and narrow sense in teaching practice:
1, broadly speaking, teachers ' learning and life should be part of the process of preparing lessons, because teachers are also in their own life experience and knowledge
Label:Tags: SQL server/mssql server/database/dba/memory Pool/Buffers OverviewUnderstanding the execution plan is important for database performance analysis, which involves statement profiling and storage, which is the purpose of writing this article, before understanding the implementation of the plan to understand some basic knowledge, so the article will say some concepts, learning will be more boring, but these basic knowledge is very important. Directory
Overview
Basic Concep
one. Adaptive cursor Sharing (adaptive Cursor sharing) Description
1.1 ACS Overview
Binding variables Enable Oracle DB to share a single cursor for multiple SQL statements to reduce the amount of shared memory used for parsing SQL statements. However, cursor sharing and SQL optimization are two conflicting goals. Writing SQL statements in writing provides more information to the optimizer, which will undoubtedly lead to better execution plans, but a l
slightly with the MySql storage engine. For example, MyISAM stores Cache result sets in OS Cache, while the most popular InnoDB stores in Buffer Pool. Ii. SQL Server's Procedure Cache SQL Server does not have a Query Cache mechanism similar to MySql, but it has its own Cache mechanism. SQL Server does not directly cache the SQL query result set, but caches the queried Data pages (Data Buffer) It has read ), it also caches execution plans (process Cac
This document describes how to use SQL Plan Management to manage SQL Execution plans. SQL Plan management provides components for capturing, selecting, and evolving SQL Plan information to prevent performance degradation caused by sudden changes in the execution Plan of SQL statements.
This article includes the following topics:
1. SQL Plan Baseline overview
2. Manage SQL Plan Baseline
1. SQL Plan Baseline overview
SQL Plan ManagementIs a preventive m
By default, WINDOWS10/8/7 has three projects in common power plans: Balance, high performance, and energy saving, you can change these 3 plans according to your needs, or you can create new power plans based on existing plans.
Create a custom power plan
To create a custom power plan based on the system's existing 3
parts:
First, the table name, stored procedure name, and view name are parsed based on the input query statement text. Then, a tree representing the query text is generated based on logical data operations.
The second step is optimization and simplification. For example, the subquery is converted to a pair of connections, the filtering conditions are prioritized, and unnecessary connections are deleted (for example, the original table may not need to be referenced if an index exists).
Step
directoryemulator: trying to load skin file '/usr/share/ubuntu-emulator/skins/EDGE/layout'emulator: skin network speed: 'full'emulator: skin network delay: 'none'emulator: Using initial system image: /home/kai/.local/share/ubuntu-emulator/UTouchx86/system.imgemulator: autoconfig: -initdata (null)emulator: WARNING: no Real SD Card found at '/home/kai/.local/share/ubuntu-emulator/UTouchx86/sdcardprime.img'emulator: Physical RAM size: 512MBemulator: Found target ABI=x86Content of hardware configur
, Oggvorbis, WAV, JPEG, PNG, GIF, and BMP. Hardware Support-accelerometer, camera, digital compass, proximity sensor and Global Positioning System (GPS). Multi-touch-support multi-touch screen. Multitasking-Supports multitasking applications. Flash support-android 2.3 supports Flash 10.1. tethering-enables Internet Connection Sharing as a wired/wireless hotspot. 3 Android Basic architecture, operating system architecture The Android operating system
/debug mode)
§ Http://dimitar.me/how-to-connect-your-android-phone-to-ubuntu-to-do-developmenttestinginstallations-or-tethering/.
O emulator is more suitable for performance testing and functional testing. Mobile is more suitable for touch operation testing and real display testing of some views.
O screen size adaptation test (enumeration large, medium, small), screen direction (enumeration horizontal, vertical screen), Task Switching Test
O memory ad
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