xcodebuild analyze

CBO well and maximize the efficiency of SQL statements, the timeliness of statistical data must be ensured. Statistical information can be generated using the full calculation method and sampling estimation method. SQL example: Full calculation method: Analyze table ABC compute statistics;Sample estimation method (sample 20%): Analyze table ABC estimate statistics sample 20 percent; The full Calculation of

The optimizer for Pl/sql statement execution of an Oracle database has a cost-based optimizer (CBO) and a rule-based optimizer (RBO). The Rbo optimization method relies on a strict set of grammatical rules, and the statement written by rules, regardless of whether the contents of the datasheet or index change, does not affect the "execution plan" of the Pl/sql statement. The CBO has been introduced since the ORACLE7 version, and many of the new technologies used by Oracle since version 7 are bas

Label: Transferred from: http://blog.sina.com.cn/s/blog_682841ba0101bncp.html 1.analyze table T1 compute statistics for table; -->user_tables (Statistics only on the overall information of the table, such as the number of rows, etc., does not involve table fields) 2.analyze table T2 Compute statistics for all columns; -->user_tab_columns (Only table field information is collected) 3.

Oracle tools: analyze (I) three major functions www.2cto.com ① collect and delete indexes, statistical information of tables and clusters ② verify the structure of tables, indexes and clusters ③ identification tables and cluster and row migration and row links for analyze collection in addition, we recommend that you use the DBMS_STATS package instead of analyze

Reprinted from: http://blog.csdn.net/guolin_blog/article/details/42238633Since Android is an operating system developed for mobile devices, we should always take the memory issue into account when developing applications. Although the Android system has a garbage collection mechanism, this does not mean that we can completely ignore when to allocate or free memory. Even if we all follow the programming recommendations given in the previous article to write programs, there is a good chance of mem

SEO optimization is mainly to make their own site ranking beyond their competitors, but a lot of people do not realize this core point, just blindly to do outside the chain, to update the site, but the time is not obvious effect, this is behind closed doors, if we can carefully analyze the top of the site, analysis of their website , find the clues to their SEO optimization, you will be able to find a way to defeat competitors, in fact, this analysis

Using Oracle LogMiner to analyze archived log received an alert email today, resulting in a rapid growth of archived log. Unable to determine the cause of the problem. LogMiner is used to analyze the archived log. The main source and network of the operational process outline is a learning process for me. This article records its detailed operations. Before performing this operation, you should first get a

We can only analyze the health of the site through a variety of system logs, and for Web sites deployed on IIS, IIS logs provide the most valuable information that we can use to analyze the response of the site to determine whether the site has performance issues or where improvements are needed.For a long-term maintenance of the site, how to make the site long-term stable operation is a very meaningful thi

One of the reasons you like PHP is that she has countless open-source programs, phpxref. comhomecode-library, and a lot of excellent code for you to read in detail! The method to analyze the source code is just like it is needed to come to a new place! How to analyze a PHP open source... one of the reasons for like PHP is that she has countless open source program http://phpxref.com/home/code-library, a lot

There are fewer tutorials on iOS performance tuning, and the decision to write an iOS performance Tuning series focuses on several aspects of memory leaks, performance optimization, traffic, and power analysis.Xcode has provided a very powerful performance tuning tool, combined with several third-party tools and some techniques, to optimize performance very simply.The first writing is the simplest, analyze static analysis.When iOS developers build or

way of thinking is already too old, we must be prepared enough to carry out our information iteration, to keep up with this era.Return to the theme, we come today to tell you today's theme, today's theme is what? Analyze our data logs with Powerbi to analyze our current server health. If not healthy, where is not healthy? is not healthy because of God horse reason? This may be what we are trying to figure

Python Pyspider is used as an example to analyze the web crawler implementation method of the search engine. In this article, we will analyze a web crawler. Web Crawler is a tool that scans Network Content and records its useful information. It can open a lot of web pages, analyze the content of each page to find all the data that interest it, store the data in a

Memory leaks are frequently encountered in Android development, and the Android system has a certain memory limit for individual apps, which can be obtained by:ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);int memoryClass = am.getMemoryClass();The Momeryclass value in the above code can be used as the memory limit for each app. This value is different depending on the device manufacturer, for example, my simulator value is 32M, if an app running on my simulator

[Reproduced from: http://www.chinaz.com/program/2010/0414/111402.shtml] The database management routine is to carry out preventive maintenance and repair the problematic content. There are usually four main tasks to check and repair: 1. Optimize the table 2. Analyze the table (analyze and store the distribution of the keys in MyISAM and bdb tables) 3. Check the table (Check table errors and statistics of th

This article explains the steps to analyze IBM Lotus Notes and Domino hangs and crashes using the Lotus Notes diagnostic (LND) tool, a process that is alsoUseful for analyzing the files in the IBM technical support folder. Showtable of contentshidetable OF CONTENTS 1 Overview 2 downloading and installing the LND Tool 3 using the tool 3.1 processing a semaphore File 3.2 processing a memory dump file