lufthansa 1800

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Table space data file (1)

8 8 600 8 9 608 8 ...... 11 624 8 12 632 8 13 640 8 14 1800 8 15 1808 8 16 768 128 17 896 128 18 1024 128 19 1152 128 20 1280 128 21 1408 128 56 7040 128 57 7168 128 58 rowsselected Dump data block information: Select object_id, Dbms_rowid.rowid_relative_fno (rowid) file #, Dbms_rowid.rowid_block_number (rowid) block # From ts_test Where rownum: Dump: # Alter systemdumpdatafile3blockmax 1 blockmin 6; Selectvaluefrom v $ diag_info; [Oracle @ felix ~]

In-depth understanding of the use of the undo_retention parameter in Oracle10g

tablespaces and you want to direct the database instance to use a particle undo tablespace.Undo_retention the undo_retention parameter is ignored for a fixed size undo tablespace. The database may overwrite unexpired undo information when tablespace space becomes low.For an undo tablespace with the autoextend option enabled, the database attempts to honor the minimum retention period specified by undo_retention. when space is low, instead of overwriting unexpired undo information, the tablespac

Optimize myeclipse7.0 speed (especially building workspace)

: permsize to the same size as-XX: maxpermsize.Almost every time eclipse gets stuck, it is caused by insufficient non-heap memory. The maximum and minimum values are adjusted to the same value because myeclipse is not allowed to change the memory size frequently.Note: XX: The sum of maxpermsize and xmx cannot exceed the memory size of your computer!Content in eclipse. ini in myeclipse7.0:----------------------------------------------------------------------StartupPlugins/org. Eclipse. Equinox. l

Oracle Interview Questions and answers

, 'yyyymm'),-1), 'yyyymm'), lag (incomes) over (order by months), 0) as prev_months, decode (lead (months) over (order by months), to_char (add_months (to_date (Months, 'yyyymm'), 1), 'yyyymm'), lead (incomes) over (order by months), 0) as next_months from (select months, sum (income) as incomes from a group by months) aa) aaagroup by months; Months max (incomes) max (prev_months) max (next_months) ---------- ------------ ---------------- -------------- 200801 4600 7500200802 7500 4600 400020080

Spark & spark Performance Tuning practices

Spark is especially suitable for multiple operations on specific data, such as mem-only and MEM disk. Mem-only: high efficiency, but high memory usage, high cost; mem Disk: After the memory is used up, it will automatically migrate to the disk, solving the problem of insufficient memory, it brings about the consumption of Data replacement. Common spark tuning workers include nman, jmeter, and jprofile. The following is an example of spark tuning: 1. Scenario: precise customer base Optimize the

Android-telephony File explanation

name of GSM is: Global System for Mobile Communications. The Chinese language is the global mobile communication system, also known as "global communication". It is a European mobile communication technology standard and the second generation of mobile communication technology, the development goal is to allow users to use a mobile phone network standard across the world, so that users can use a mobile phone all over the world. Currently, China Mobile and China Unicom each have a GSM network, w

Basic configurations of Network Security Series 9 WAF

Tags: WAF configuration Digital China dcfw-1800-waf Web Application Security Gateway (WAF) is designed to address WEB Website security issues, and can identify and protect multiple Web Application Layer attacks in real time, for example, SQL injection, XSS, and illegal directory traversal. WAF devices are generally deployed at the front-end of web servers and are deployed with external firewalls. All traffic destined for the internal network must go t

[Sticker] minimum SMS sending and receiving system design with USB interface

cost.   Figure 1 system diagram 1.1 Introduction to The TC35I Module Currently, common GSM modules in China include waecome's wmo2, Ericsson's dm10/dm20 series, ZTE's zxgm18 series, and Siemens's TC35i. Among them, Siemens TC35i series modules are cost-effective and have domestic radio device access licenses. This design selects TC35I from Siemens. TC35I is an industrial GSM module that supports short messages in Chinese. It works in the egsm900 and GSM 180

VPN Module Analysis

socket to do two things.The first is to send launch parameters to mtpd or racoon deamon.The second is to receive the status of mtpd.In addition, Java layer will read the status of VPN from system property-"VPN. Status" which is writen by IP-Up-VPN.The VPN profiles is saved in/MISC/VPN/profiles/folder. 3. Native layer.As we said in Java layer, mtpd and Racoon daemon are launched by Java layer, what is more, Java layer also send launch parameter to these daemon by local socket.For mtpd daemon, th

Repeat the old books to deeply understand what linear algebra is.

. He has developed the theory of the determining factor, in the symbol of the determining factor, he arranged the elements into a square matrix and used the new method of dual tabulation for the first time. At the same time, he found the formula for multiplication of the two determining factors and improved it and proved the expanded theorem of Laplace. Relatively speaking, the earliest use of the matrix concept is embodied in the bilinear linear work after the 1700 s by using the concept of a m

ORA-01555 Fault Analysis

. Undo_retention The undo_retention parameter is ignored for a fixed size undo tablespace. the database may overwrite unexpired undo information when tablespace space becomes low. for an undo tablespace with the autoextend option enabled, the database attempts to honor the minimum retention period specified by undo_retention. when space is low, instead of overwriting unexpired undo information, the tablespace auto-extends. ifMaxsize clause is specified for an auto-extending undo tabl

PHP online users

server side, visitors can know when they arrive, and visitors can also know when they are browsing the page. But how can they know when they are going? The HTTP protocol is stateless, so it cannot be known. The common practice is to record the time when the visitor browsed the site page for the last time. If the visitor does not have any new actions within a specific period of time, the visitor may be deemed to have left.Based on the above idea, I think it is better to use a database because th

Cost of finding a wife from all over the country

1500 yuan. 5. xi jiu is a medium Hotel (Happy class) with 25 tables, including self-built wine, cigarettes, sugar, 1000 × 25 = 2.5 W, the average price of red packets collected is 1200 RMB per table, which is 1200 × 25 = 3 W. The profit is 0.5 RMB. 6. For honeymoon, the main destinations are Hong Kong, Macao, Singapore, Thailand, Yunnan, and Hainan. The average fee per person is 6000, Which is 6000 × 2 = 1.2. 7. From getting a girl to deciding to get married, including going out for dinner, buy

Linux Kernel division implementation

Linux Kernel division implementation-general Linux technology-Linux technology and application information. See the following for details. Recently, we have been developing modules in the Linux kernel. We need to collect and compare some information. For example, we have two numbers: 2000 and 1800. We want to obtain the ratio of two numbers through division and remainder, for example, if the value is 2000/1800

PHP file size limit

Configure the php. ini file (for example, upload a file smaller than MB)Search for the following options and modify them.File_uploads = On; enable the File Upload OptionUpload_max_filesize = 500 M; Maximum number of uploaded filesIf you want to upload a large file, the above two files are not enough. You must increase the server cache limit and extend the script execution time.Post_max_size = 500 M; maximum post sizeMax_execution_time = 1800; Maximum

How to count PHP online users-PHP source code

above idea, I think it is better to use a database because the database is more efficient than other methods such as text files. The following example uses MySQL, and it is easy to use other types of database systems. Then, call the PHP file on all pages to update the data and display the number of online users. However, there is a question: how long does the visitor count as concurrent? Generally, it is half an hour, that is, 1800 seconds. The speci

Php in_array performance problems

PHP performance has been improving. However, if it is not used properly or you are not careful, you may step on the internal implementation of PHP. I encountered a PHP performance problem a few days ago and it has been improving. However, if it is not used properly or you are not careful, you may step on the internal implementation of PHP. I encountered a performance problem a few days ago. This is the case. a colleague reported that it took five seconds to return an interface. we review the co

A friend company officially announced a failed start-up

even million. Finally, I saw a phper on the market. He just came out from www.wang.com and wanted to start a business together with a person in Shanghai. (I think it's in his brackets: The character is okay, I finally understood what this sentence really meant .) So I gave him QQ to the boss, asked them to talk about it, and finally provided accommodation. 3500 was done. Later, through planning, we recruited a colleague who played and ran the karting Che. A professional driver, he was the first

Google mobile will be officially released soon

GB/16 GB) (contract required) Operator T-mobile ATT Frequency 3G/HSDPA; 900/1800/1900 MHz 3G/HSDPA/EDGE; 850/900/1800/1900 MHz Dimensions 117 × 55 × 16mm 115.5 × 62.1 × 12.3mm Weight 157 grams 133 grams Screen Resolution 480x320, 3.17 inch 480x320, 3.5 inch Operating System Google Android Mac OS Camera 3.1

[Reprinted] ZIGBEE: Neighbour Table in Coordinator

The size of the neighbor table of the master node is 24, which means that the master node can have up to 24 subnodes (enddevice or router ). In the JZA_vStackEvent event on the master node, you can set the following parameter when the network is successfully started: JZS_vEnableEDAddrReuse (1800); the parameter in the square brackets is s, indicating that, if the child node in S does not communicate with the master node, the master node considers the

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