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bufferQcache_inserts indicates that the query cache has always had the result of how many query commands were cached beforeQcache_lowmem_prunes indicates the number of query results that have been overrun and deleted from the query buffer fullQcache_not_cached indicates the number of query commands that do not enter the query bufferQcache_queries_in_cache Query Cache The results of how many query commands are currently cached This part is different from what I found later. MySQL Query cache v
the system will enter Windows in Safe mode. In Safe mode, Windows uses the default settings, at which point Windows starts the minimum device drivers that you need, and does not start any user-set Autostart program. When you run Disk Defragmenter in this very "clean" environment, the defragmentation process is undisturbed. However, in Safe mode, you will not be able to access the CD-ROM drive, printer, or other device. Iii. prohibition of the rescheduling process By default, Disk Defragmenter
Computer boot slow How to do, do not change the premise of computer hardware, the following methods can be very good to improve the performance of the computer: Method one, antivirus. Dial out the network connection, turn off System Restore, in Safe mode, with the latest version of anti-virus software antivirus. Method Two, clean up the disk and defragment the disk. 1. In My Computer window, right-click the letter you want to clean-"properties"-"cl
First, open the chassis, dust, check the CPU, video card cooling, oil to the fan. Second, antivirus. Dial off the network connection, turn off System Restore, in Safe mode, with the latest version of antivirus software anti-virus, and it is best to change an anti-virus software to kill again. Third, with the optimization master or Super Rabbit or Huangshan repair repair ie. Clean the disk and defragment the disk. 1. In My Computer window, right-c
: Open "My Computer"--> on the removable disk on the right mouse button, select "Properties"; Step two: In the pop-up window, select the Tools tab--> Click on the "Check Disk" window under "Check out"--> pop-up. Click on the "Automatically fix file system error (A)" and "scan and attempt to restore bad sectors (N)" to--> "Start" ( S) "for inspection and repair; Step three: After checking the repair, click "Defragment" und
, select the properties, in the pop-up window setting "Enabled" to change "bandwidth limit" to 0% , which can speed up downloads. Slow Web pages and machine configuration also has a certain relationship, cleverly set up some organs, but also to improve the speed of machine operation, improve Web access speed. Here are some possible comprehensive approaches: First, clean the disk and defragment the disk. 1. In My Computer window, right-click the lett
communication process It is understood that for more than 2 minutes on the machine, 360 computer technicians can usually shorten the boot time by half, the resolution rate of up to 91%. At present, "super speed" function is very popular with users, although not long, but more than 240,000 users have used this service. If you are not satisfied with the boot speed, but can not do anything, may wish to try "super speed", Clean the disk and defragment
the computer reaction speed is not so card! Clean disk 1, this many small partners should still know. Click on "My Computer". First we do disk Cleanup on the hardest to clean up the C disk. Place the mouse on the C-Drive and right-click to select Properties. 2. Select "Disk Cleanup" in the attribute column and wait for a few minutes later. 3, after the scan is complete, in the Delete a column select the file to delete, tick in front, then click "OK". The system will
offline defragmentation, we usually follow the following process: 1. Perform a full backup of the store you are working on before you perform an offline defragmentation 2. Dismount Store 3. Use ESEUTIL/MH to confirm that the EDB and STM files are "Clean shutdown" (discussed in more detail in the previous installment) 4. Perform the following command to defragment C:/Program files/exchsrvr/bin>eseutil/dX:/exchsrvr/mdbdata/sg1ms1.edb/tX:/
Welcome to the Windows Community forum, interactive communication >> access with 3 million technical staff One of the best ways to improve your computer's performance is to optimize your hard drive. The features included in Windows help you optimize the various types of drives that your computer uses today. No matter what type of drive your computer is using, Windows automatically chooses the optimal way to fit the drive. By default, the optimize drive (formerly known as Disk Defragmenter) run
larger than 4KB under any circumstances would have the following negative effects:• The Disk Defragmenter tool cannot defragment this volume• Unable to use NTFS file compression features• Wasted disk space increaseThere are several ways to determine the average size of a file, one way is from the Start button, select Run, type cmd in the Open box, click OK, and then execute C hkdsk on the command line, using the number of files on the volume to remov
warnings, need to increase virtual memory as appropriate. You can generally disable the virtual memory, restart the computer into Safe mode (then do not run a large number of programs), and then defragment, after the completion of the reset virtual memory, can make the page file does not contain fragments, read and write faster. Or use pe/emergency disk to boot into the system, delete the paging file, defragment
1. Hard drive Daily maintenance hard disk in the use of the process should pay attention to the following aspects: Computer work is strictly forbidden to move or collision machine, otherwise it may make the hard disk head and disc collision, causing the hard disk head and disc damage, thus unable to read data. Do not often low-level format of the hard disk, otherwise it will cause hard disk read and write unreliable, and shorten its service life. Advanced formatting is less damaging to hard dr
Rebuild partition (official: With drop all records then reinsert is the same effect; Used to defragment table fragments) ALTER TABLE Operation_log rebuild partition ' 2014-01 '; rebuild multiple partitions ALTER TABLE Operation_log rebuild partition ' 2014-01 ', ' 2014-02 '; the process is as follows: Pro optimizes partitions (if you delete a large number of records for a partition or a varchar blob to a partition)There are many updates to the f
Tags: delete deleted record database space size does not decreaseI remember when I was in college, when I was learning computer, the teacher told me that the delete record only adds a delete ID to the record in the database, so that the database space is not reduced, then did not think so much, yesterday found a database using delete deleted capacity unchanged, Baidu later found the following a webmaster to share the file, write very good, tidy up for you to reference.Today the space quotient to
operation, it is the best storage engine today! The storage engine used by default after MySQL 5.5 is InnoDBTIPS: in a production environment, if there are tables MyISAM this storage engine, it is recommended to do all MYISAM-->INNODB storage engine conversions! But after MySQL 5.7, the system tables are INNODB! 12th Palm----by six dragonsThe file system strongly recommends using XFS, no longer using EXT3,EXT4, because XFS is also the b-tree structure that is closest to the database tree struct
: decomposing a table partition Pmax into a p20160518 and Pmax two partitionsALTER TABLE Pw_trade_record REORGANIZE partition Pmax into(partition p20160518 values less than (Unix_timestamp (' 2016-05-18 ')),PARTITION Pmax VALUES less THAN MAXVALUE);View Partition Table StatusSelect Table_schema,table_name,partition_name,partition_ordinal_position,partition_method,partition_expression, Partition_description,table_rows,avg_row_length,data_length from INFORMATION_SCHEMA. partitions where table_name
()); ----No data loss Redefine the hash partition table: Alter table EMP Partition by hash (salary) partitions 7; ----No data loss To redefine a range partition table: Alter table emp Partitionbyrange (Salary) ( Partition P1 values less than (+), Partition P2 values less than (4000) ); ----No data loss To delete all partitions of a table: Alter table emp removepartitioning;--does not lose data To rebuild a partition: This has the same effect as deleting all the records that were saved in the pa
Directory of this documentSlab allocation mechanism: Defragment memory for reuse· Main terms of Slab allocation· The principle of caching records in slab· Disadvantages of Slab Allocator· Tuning with growth factor· View the internal state of the memcached· View the usage status of slabs· Summary of memory storageSlab allocation mechanism: Defragment memory for reuseThe most recent memcached by default uses
computer, select the drive that you want to defragment disk-properties-tools-Defragment now 10, install an optimization master or Super Rabbit and other computer system cleaning software, optimized, the computer will be much faster!! 11, the computer hard disk for a long time, will make the computer slow, repartition installation can repair the logic is bad, the computer will be f
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