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Oracle Single data file expands beyond 32GThe tablespace data file capacity is related to the Db_block_size setting, which is specified when the DB instance is created. The Db_block_size parameter can be set to 4K, 8K, 16K, 32K, 64K, and so on, Oracle's physical files only allow 4,194,304 blocks (this parameter is determined by the operating system, which is generally the number), The maximum value correspondence of a tablespace data file can be compu

IntroductionWeb development needs static files are: CSS, JS, fonts, pictures, can be accessed through the web framework, but the efficiency is not optimal. Nginx is much more efficient at working with static files than the WEB framework, because you can use the GZIP compression protocol to reduce the volume of static files to speed up static file loading, turn on caching, and time out to reduce the number of requests for static files. The following describes how to manage static file access th

limitations.Performing I/O in blocksTo improve I/O performance, PostgreSQL always performs I/O in blocks of 8k size. Therefore, you will see that your data files are always growing in 8k increments. When it comes to physical replication, you must make sure that both (master and slave) are compiled with the same block size.[Unless you explicitly compile PostgreSQL according to the different block sizes you

is currently exactly one packet that needs to be sent to the receiving end of the ACK acknowledgement, the ACK acknowledgement is attached to the packet and sent immediately. 3, when the timer expires, the ACK confirmation message is sent immediately. algorithm: 1, assuming Microsoft The TCP stack is spliced with packets that exceed the MTU value, and this data is sent immediately, without waiting for the previous data packet ack acknowledgement information. In Ethernet, the MTU

object by executing the engine.Based on the size of the object, the GC divides it into two categories: small objects (The GC free memory to the memory allocator is done through the memory allocation context. The size of the memory context has the allocation limit defined: The memory allocation context (Allocation contexts) is a smaller area on a thread-specific heap area (heap segment). On a single-processor (that is, a logical processor) machine, use the single context, which is the N

engine.Based on the size of the object, the GC divides it into two categories: small objects (The GC free memory to the memory allocator is done through the memory allocation context. The size of the memory context has the allocation limit defined: The memory allocation context (Allocation contexts) is a smaller area on a thread-specific heap area (heap segment). On a single-processor (that is, a logical processor) machine, use the single context, which is the No. 0 generation memory a

created for 8086/8088.In addition, the INTEL386 processor also supports: 32-bit address bus supporting up to 4G of physical memory Segmented (segmented) memory mode and flat (flat) memory mode Paging, 4k-sized pages provide a way to "virtual memory management" Support for parallel stages (should mean that the instruction executes several stages can be parallel) Clock frequency is 12.5MHzIntel?486 Processor (1989)The Intel486 processor enhances the execution of instruct

= $mcache->getallkeys (); Var_dump ($allKeys); Print_r ($mcache->getstats ()); * * In fact, from phpinfo () we can see that for the contents of more than 2000 bytes of content saved, memcached will turn on the compression For PHP arrays, Memcache is serialized, so the length of the saved content can be different from the actual content length. If you want to see the Memcache usage status on the server, you can use the Telnet 127.0.0.1 11211 command to view Get the actual stored value: Get str

To assess the development costs of this order system. To help a trading company make an order system, the basic module is: 1. Basic information of commodities. 2, the customer has been customer company basic information. 3. Basic information of employees. 4, quotation. 5, purchase orders. 6, delivery orders. All of the above documents require to be able to email to the customer, or export word, Excel, pdf format, and print, I would like to develop such a system now approximate price can be how

Original link: http://blog.csdn.net/maopig/article/details/6982457The system provides a socket buffer size of 8K, which you can set to 64K, especially when transferring live video.When the socket sends the data to the socket buffer, then accepts the function and then takes the data from the buffer, if the sender is very fast, the buffer is quickly filled (the socket default is 1024x8=8192 bytes), At this time we should set the buffer size according to

a test file under/var for testing use650) this.width=650; "class=" Exp-image-default "alt=" use/dev/zero and/dev/null to test HDD read/write Speed "src="/HTTP/ g.hiphotos.baidu.com/exp/w=500/sign=bf536fcaf503738dde4a0c22831ab073/ 622762d0f703918fa6be2da0523d269759eec468.jpg "/> Step reading 4Next, we write the infinite input in the/dev/zero to the test file via the DD command, and note that we use DD to make the timing with the time command.Time DD If=/dev/zero of=/var/test bs=

, unreasonable; on the one hand, the interrupt service program should deal with interrupts as soon as possible to ensure the IO throughput rate.-------------------------------Split Line----------------------------By reading the third edition of the Ulk Chinese version of page 164, let me have a clearer understanding of this issue:When the kernel is compiled with the value of thread_size set to 8K, then the kernel stack of each process is

have learned the basic use of buffer, next, we have to start doing buffer to do some testing. 3.1 8K's creation test Every time we create a new buffer instance, we check that the current buffer's memory pool is full, that the current memory pool is shared for the new buffer instance, and that the memory pool size is 8K. If the newly created buffer instance is greater than 8K, the buffer is given to the

The system provides a socket buffer size of 8K, which you can set to 64K, especially when streaming live video. When the socket sends data to send data to the socket buffer, then accept the function and then fetch the data from the buffer, if the sending end is very fast, the buffer will be filled up quickly (the socket default is 1024x8=8192 byte), At this point we should set the size of the buffer according to the situation, we can implement the #in

Come to the new company to do game development has been almost two years, the period encountered a variety of problems, make this record, so as not to repeat the same mistakes. 1: The game backstage uses the MySQL database, most game information uses the BLOB field to represent, adds the version number in the BLOB information, this can change the game information dynamically, but does not need to modify the data structure frequently. With the game to break development, more and more games, the

sending of Ethernet data can not be separated from the ram inside the drive chip, but also called the hardware buffer. The enc28j60 includes a hardware buffer of 8 K, part of which is used by the receiving buffer and the other part for the send buffer . The ultimate purpose of control enc28j60 is to manipulate the hardware buffer. When executing the Ethernet Send command, the data is populated into the sending buffer, and the relevant registers are sent to transmit the Ethernet data, and the Et

/mysqlbug script! 3, configure mysqld multiple instance my.cnf files (1) The configuration my.cnf file detailed explanation [Root@test4 ~]# cat/etc/my.cnf [Mysqld_multi] mysqld =/usr/local/mysql/bin/mysqld_safe mysqladmin =/usr/local/mysql/ Bin/mysqladmin user =test password =test [client] #password = your_password Port = 3306 Socket = /tmp/mysql.sock [mysqld3306] Port = 3306 socket =/tmp/mysql3306.sock skip-external-locking Key_buffe R_size = 16M Max_allowed_packet = 1M Table_open_cache =

crash, binary log can only lose a maximum of one statement or transaction. #However, setting it to 1 causes frequent IO operations, so this mode is also the slowest way. #when Innodb_flush_log_at_trx_commit is set to the 0,MYSQLD process, a crash causes all transactional data to be lost in the last second. #when the Innodb_flush_log_at_trx_commit is set to 2, all transactional data may be lost in the last second only if the operating system crashes or the system loses power. #commit事务时,Control

This article mainly describes how to completely uninstall Oracle and grid software.Operating EnvironmentSuSE11Operation Steps1. Switch Oracle user, stop Oracle Database Listener and DB instance/as sysdba SQL> shutdown immediate; SQL> Exit2. Switch grid user, stop ASM instance monitoring and has service under grid-FDescription: You can use Ps-ef | Grep-e ' Oracle|grid ' | Grep-v grep to confirm if there are any processes. If so, kill them manually.3, switch root user, delete/opt/oracle,/opt/oracr

Tags: http ar using for SP data on art issuesCreating the DB2 (DB2 certified DB2 Training) database (Database training database certification) should be a knowledge that every DB2 user needs to know, and here's how to create a DB2 database in the AIX (AIX certification exam IBM AIX Training) environment. If you're having trouble creating a DB2 database, you might want to take a look.View Environment Variables Db2setIf you find that Db2codepage is not 819 in Db2set, performHere is the code snippe