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Plsql_performance optimization series 14_Oracle High Water Level High Level analysis, plsql14_oracle 2014-10-04 BaoXinjian I. Summary PLSQL _ performance optimization series 14_Oracle High Water Level analysis A

, although no actual records are stored, the HWM is in the 2nd block. When we keep inserting data into Pm_user, The 1th block has not put back the newly inserted data. At this point, Oracle uses blocks above the high water level to store the new data, and the HWM itself moves up. That is, when we keep inserting data, the HWM will move up, so that, under HWM, it means the used block, Above the HWM is a block

Objective-C Qiqiao technology-underlying forced calling of high-level interfaces, objective-c high-level Technical lust refers to technologies and products that are too clever and useless. Let's take a look at a piece of code. //. H-(void) funa {[B funB];} // B. h-(void) funB {// How can I obtain object a of call obje

Python functional programming-high-level functions, python high-level 1. variables can point to functions. 2. The function name is also a variable >>> Abs = 10 >>> abs (-10) Traceback (most recent call last): File "3. Input Functions Since variables can point to functions and function parameters can receive varia

Javascript is your high-level function (advanced application), javascript high-level In common programming languages, function parameters can only be basic types or object references, and return values are only basic data types or object references. However, in Javascript, a function can be passed as a parameter or ret

Python 3 Study Notes (5) ---- variables, recursion and high-level functions, python high-level functions I. Variables 1. the variables defined in the subroutine are called local variables, and the variables defined at the beginning of the program are called global variables.2. The global variable scope is the whole pro

"Wireless liquid level transmitter application case" water level wireless remote control pump scheme for high reservoir　　　　 One, introduction to the scheme The scheme adopts 433MHz independent wireless communication mode, no running costs, real-time communication, and the use of public GSM network, through SMS to realize remote alarm.Each reservoir is divided

" advanced and low-level languages "This article records how mono makes you work more efficiently, and how to enable software to be extensible without having to rewrite C/C + + into C # code.In the past, software used to is written entirely in a single programming language. Developers had to strike a balance between high performance and have to pick a low-level l

Detailed description of oracle high water level line and oracle water level line 1. What is a High Water Mark )? All the oracle segments (segments here, for ease of understanding, we recommend that you use segment as a synonym for the table) have an upper limit to accommodate data within the segments, we call this uppe

——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————The question of reading "Computer System Essentials: Building a modern computer from scratch": What are the essential links between high-level and low-

"All the way-from high-level language to low-level language " born in 90 , I am very ordinary, in school is not what genius, has always been a very general academic performance. When I was a kid, I was just passionate about games,from the moment of contact to the FC console, I became a FC game up people, as long as I played the FC

Solution to slow query caused by high water level line and water level line As we all know, with the continuous DML operations on table records, the high watermark line (HWM) of the table will be continuously improved. After the DELETE operation, although the table data is deleted, however, it does not reduce the table

Chapter 2 tornado: from entry level to advanced level to build a technical forum supporting high concurrency-course guidanceTornado from entry level to advanced level creates a technical forum supporting high concurrency-course gu

Note: Essays can be seen, the article is not found but can be accessed through the URL, the log people can't find the URL also seeNetwork Programming: Breakpoint ContinuationWeb framework: for writing Web sitesDesign pattern + algorithmHigh-level languages: Java, C #, PHP, Go, Ruby, C + + ...Low-level language: C, compilationMachine code and bytecode: high-

1 high-level language: Python java ... Generate byte code2 Low-level languages: C-Compilation ... Generate machine code3 Low-level language love high-level language, because most of the high