rebuild macbook

Although the new 12-inch retinal MacBook will have to wait until April 10, Apple's new MacBook Air and MacBook Pro were unveiled to Apple's website yesterday. Their configurations are upgraded and the price remains unchanged. How about these 2015 MacBook Air and MacBook Pro,

This paper uses 10046 events to analyze the difference between ALTER INDEX rebuild and ALTER index rebuild online Alter index rebuild online is essentially a scan table rather than scanning an existing index block to achieve an indexed rebuild Alter INDEX rebuild only scans

What are the general conditions for refactoring the index1. When the index is based on the table of DML operations frequently, over time, indexing efficiency is lower and higher, so you need to rebuild the index2. When the table is moved to another tablespace, the index to which the table is located becomes invalid and the index needs to be rebuilt Note: DML (manipulation Language) data manipulation language, one of the SQL classifications, DDL (data

Create Table T1 as select * from EMP;Insert into T1 select * from T1;Create index I _empno on T1 (empno );Create index I _deptno on T1 (deptno ); @? \ RDBMS \ admin \ utlxplan SQL> explain Plan for alter index I _empno rebuild; Explained. SQL> select * from table (dbms_xplan.display ); Plan_table_outputBytes ---------------------------------------------------------------------------------------------------Bytes ----------------------------------------

2014-10-04 BaoxinjianI. Summary Index reconstruction is an issue that has been hotly debated. Of course, Oracle has its own views, and many of our DBAs follow this guideline to rebuild the index, which is that Oracle recommends rebuilding the index in 2 scenarios where the index depth exceeds level 4 and the deleted index entry occupies at least 20% of the total number of existing index entries. Recently, Oracle has also put forward some of the

Tags: des style blog http color io os using AR2014-10-04 BaoxinjianI. Summary Index reconstruction is an issue that has been hotly debated. Of course, Oracle has its own views, and many of our DBAs follow this guideline to rebuild the index, which is that Oracle recommends rebuilding the index in 2 scenarios where the index depth exceeds level 4 and the deleted index entry occupies at least 20% of the total number of existing index entries. Rece

Rebuild notes -- remove the value assigned to the parameter, and remove the value from the rebuild. This article is in the study of the summary, welcome to reprint but please note the Source: http://blog.csdn.net/pistolove/article/details/42497857 In the previous article, we introduced "breaking down temporary value changes". This article will introduce the refactoring method of "removing the value of a pa

When rebuild index VS. rebuild index online create index and rebuild index are used, the No. 4 lock will be applied to the original table, and the No. 3 lock will be applied to obj $ to prevent DML operations on the original table. Create index online and rebuild index online use a new temporary table to modify the ind

Label:First, under what circumstances need to rebuild index 1, too many fragments (reference value: >20%)How index fragmentation occurs, move to the fragmentation and fill factor in the T-SQL query Advanced-sql Server index2, fill through the Low (reference value: Possible causes for the population to pass Low: ①. There is a partition table ③. The clustered index is not a digital ④. Less than the number of millions of data Ii. reconstruction of the in

Rebuild Data Center: "EXCEL export exception", rebuild data center export excel An exception occurred when the data center was restructured and the EXCEL export function was completed. When you run the statement to export an EXCEL file: Exception: Here, I would like to share with you the reason and solution. Please give me more advice! Cause:This exception occurs when the program runs the call transfer ad

CodeThe bad taste section describes common bad code and is basically popular with variousProgramming Language.6th ~ Chapter 11 summarizes some refactoring techniques in Java, which are based on the Reconstruction notes in the actual operation process.ProgramYou can choose to read it.Refactoring involves many opposite operations such as refining and inline functions, which may confuse people. What exactly do they follow? Congratulations, you have noticed this, which means we are notNerd. All you

CREATE OR REPLACE PROCEDURE p_rebuild_all_index (tablespace_name in VARCHAR2,-this is the table space name, and you can pass in NULL if you do not change the table spaceOnly_unusable in BOOLEAN)--is only an invalid index operationAsSQLT VARCHAR (200);BEGIN--only non-temporary indexesFor IDX in (SELECT index_name, Tablespace_name, STATUSFrom User_indexesWHERE temporary = ' N ') LOOP-If an invalid index is rebuilt, and if the index is not invalid, skipIF only_unusable = TRUE and IDX. STATUS GOTO C

The new MacBook Air 2015 has been released, I believe many friends are impatient, but the problem comes, 2015 new MacBook Air and 2014 old MacBook Air which is better, who is more worthy to buy, below and small set together to see. MacBook Air 2015 and MacBook Air 2014 dist

What about the MacBook fonts? Some MacBook users feel that the MacBook fonts are not as bright and clear as Microsoft's fonts, but this is because there is no retina screen! Below the small Lego to bring you a MacBook font is not clear solution, No need to retina screen can also Oh!

The Apple MacBook product line was fully updated at the recent spring release, with a new MacBook in addition to the MacBook Air and MacBook Pro getting a processor update. So the question is, what's the best deal for a new MacBook in contrast to the old

MacBook dual system Multi-partition is actually very simple, you just need to make the MacBook as a normal PC on it!Ignore Apple's official website warning, the Apple official website warns you can only use Bootcamp installs and cannot be many partitions, the person is frightened not lightly. In fact, do not worry too much, it is a common computer, even though it is a Mac.As my personal experience tells you

A MacBook's CTRL key Command key, a space around each one. There are no home and end keys on the MacBook keyboard, the home and end keys use shortcut keys in the MacBook, home is the fn+ left arrow, end is the fn+ right arrow, the top page is the fn+ up arrow, and Down is the fn+ down arrow. more MacBook's corresponding Windows keyboard: The MacBook Command k

Sometimes our MacBook computer runs a program card where it takes a long time, the program itself may provide a Cancel button, point and no response, at this time we would like to forcibly shut it down, then how the MacBook forced to shut down the program running in the background? The following perfect small series to bring you a few about how the MacBook shut d

MacBook Pro how to switch machine The new MacBook Pro with Touch bar does not have a power button, and the switch is as follows: Now you just need to lift the MacBook Pro screen and it will turn on automatically, but when you shut down, you have to press the button on the rightmost touch ID fingerprint recognition Key instead of simply closing the screen.

MacBook Air 2015 and MacBook Air 2014 distinguish between who is more worthy to start 　MacBook Air 2015 New MacBook Air 2015 uses a 12-inch (diagonal) LED backlight Retina display, Thickness: 0.35–1.31 cm (0.14-0.52 in), 0.92 kg (2.03 lb) 　　13 inch 2014 M