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The difference and choice between MyISAM and InnoDB, detailed summary, performance comparison

Tags: compressed ref dump determines NSA copy should continuous Zab1. MyISAM: The default table type, which is based on the traditional ISAM type, ISAM is an abbreviation for indexed sequential access method (indexed sequential access methods), which is the standard way to store records and files. It is not transaction-safe, and foreign keys are not supported, and if a large number of Select,insert MyISAM are performed, the comparison is appropriate.2

mysql-innodb-Lock

Tags: article compute add understanding encounter strong NSA ANSI SenseBefore InnoDB lock, why start transactionInnoDB the release of a lock after a transaction commit/rollback, once the transaction commits/rolls back, the lock in the transaction is automatically freed, InnoDB automatically commits by default Autocommit=1 Search criteria use indexes and lock differences that do not use indexes: A specific row is locked when the retrieval condition has

WinDbg Debug Kernel Shellcode

Tags: technical breakpoint Color Create special share image center ble BSPBefore the NSA SMB vulnerability needs to tune the kernel of the shellcode, so collated a bit of WinDbg debugging Shellcode skills. It is easier to load shellcode directly in the application layer by following these steps . Dvalloc 5000 . readmem Shellcodepath allocaddress length R EIP = allocaddress Because the. Dvalloc command is not available in dual-

Createsqlquery is not valid without active transaction workaround

Tags: thread NSA struts GETC CTI existence framework personal problemsError occurrence Scenario: HIBERNATE+STRUTS2 integration occurs when the Hibernate+struts2+spring (SSH) framework is integrated Solution:When we use the Hibernate framework to integrate with other frameworks, we encounter "cannot execute in an inactive transaction (Org.hibernate.HibernateException:createSQLQuery is not valid without Active transaction) ", I have repeatedly looked at

Python Nosql-redis connections, pipelines

Tags: connection pool disk PHP return pip NSA file __name__ receiveThe difference between a non-relational database and a relational database: Benefits of non-relational databases: Performance NoSQL is based on key-value pairs, which can be imagined as the corresponding relationship between the primary key and the value in the table, and does not need to be parsed by the SQL layer, so the performance is very high. Scalability is also due

SQL SERVER Transaction-related

Tags: commit ssms SQL font arc NSA nvarchar prim rollback1 preparing the data and the several settings involved Set TRANSACTION Isolation LEVEL READ UNCOMMITTED--Sets the isolation class of the transaction session (the default is read UNCOMMITTED) and is valid only for the current process (that is, only for open ssms Current Query window, Open another query window is invalid) Set Xact_abort off-sets the exact end of the switch (the default is OFF) and

zabbix3.2 using your own template to monitor MySQL

Tags: echo unsafe template parameter Stat NSA HTTP etc accountFirst, Zabbix with MySQL template monitoring items The MySQL monitor template is already available after Zabbix3.0, so we just need to refer to the template Zabbixserver comes with. Zabbix default of 14 monitoring items We just need to get the values needed for the monitoring items, and most of these values can be obtained through the mysqladmin commandSecond, write a script to get

partition table in SQL Server 2005 (vi): Converting a partitioned table to a normal table

Tags: arp statement drop function Targe using the copy NSA indexMy Russian name is "do not toss uncomfortable", so, do not put the partition table A good toss, I am not comfortable. In the previous section, we discussed how to create a partitioned table directly and how to convert a normal table into a partitioned table. So what's the difference between these two ways of creating a table? Now, I've created two more tables in a new way: The first table

SET IDENTITY_INSERT (Transact-SQL) allows explicit values to be inserted into the table's identity column

Tags: numeric session http Col Auto NSA blog Sel BBBHttps://docs.microsoft.com/zh-cn/sql/t-sql/statements/set-identity-insert-transact-sql Identity_insert allows you to manually insert an explicit value into the identity column of the table, onallows, off does not allow When inserting data, the self-growing column is automatically processed by the system and does not require you to specify a value. The self-growing column allows you to specify a value

Access-control-allow-origin

Tags: com res pre NSA Inspector Zll test source offWhen use Vastinspector to check our vast response, it tiped: "No ' access-control-allow-origin ' header is present on the requested resource. Origin ' https://imasdk.googleapis.com ' is therefore don't allow access "on the console, So we had to solve it, to make sure our video play smoothly. According the docs: access-control -allow-origin: origin header value> access-control-allow-credentials: We a

Wiley Publishing SQL Server 2005 treasure

Tags: com window NSA DHA win Thunder MDA Tran. NetThe original Published time: 2008-07-30--from my Baidu article [imported by moving tools]Wiley Publishing SQL Server 2005 treasureThunder Special high-speed downloadThunder://qufmdha6ly8ymtaunteumtgwlji1mi9iynmvy29tchv0zxivu1fmllnlcnzlci4ymda1lkjpymxllnjhclpaA new generation of data management and analysis softwareToday's organizations face a number of unprecedented data technology challenges: The high

Springboot database connection Pool Common configuration

Tags: catalog pos NSA upd DBCP active utf-8 status CEEIn the configuration file, add the following configuration (I'm using a multi-data source): Spring.datasource.primary.url=jdbc\:mysql\://localhost\:3306/test?useunicode\=truecharacterencoding\= Utf-8 Spring.datasource.primary.username=test spring.datasource.primary.password=123456 Spring.datasource.primary.driver-class-name=com.mysql.jdbc.driver #验证连接的有效性 Spring.datasource.primary.test-while-

Basic operations: SELinux get started to master

Tags: related war another mechanism free code share PNG configFirst, Introduction1. Official meaningSELinux is an enforced access control (MAC) security system based on the domain-type model (DOMAIN-TYPE), which is written by the NSA and designed into kernel modules, and some of the corresponding security-related applications have been patched by SELinux, and finally there is a corresponding security policy. Any program has full control over its resou

Turn off SELinux

Tags: href off print als control src US display ackSELinux (security-enhanced Linux) is the United States National Security Agency (NSA) implementation of mandatory access control, is the most outstanding new security subsystem in the history of Linux.Turn off SELinuxTemporary entry into force:Order temporary Effect: Setenforce 0 (temporary effective can be directly with setenforce 0) 1 enable 0 alarm, do not enablePermanent entr

Linux server performance Analysis and tuning

, it is an open encryption algorithm, the United States National Security Agency (NSA) Use it to protect top secret information.8. Remote Backup service SecuritySecurity is the most important factor in choosing a remote backup service, and most system administrators are afraid of two things: (hackers) can delete backup files and not restore the system from backup.To ensure the security of backup files 100%, backup service companies provide remote back

15.3. SELinux Introduction

Tags: mac kernel min DAC document fine documents Introduction model1, Selinux:selinux-nsa security-enhanced Linux (selinux).Work with the kernel.2. Linux legacy security Model: DAC, autonomous access controlSELinux Security Model: MAC (mandatory access control)3, SELinux mode of operation: (there are two types)Strict: strict level, each process receives SELinux controlTargeted: Only a limited number of processes are controlled by selinux, only the pro

Selinux, converged links, IPV6, firewall basics

Tags: using user profiles sshd set vsftpd scripts ash/etc Linux SecuritySELinux security mechanism, system security? security-enhanced Linux– The NSA National Security Agency led development, a set of enhanced Linux systemsFull-force access control system– integrated into the Linux kernel (2.6 and above) running–RHEL7 based on SELinux system for users, processes, directories and filesProvides a pre-set protection policy, as well as management tools? S

Linux System learning Seventh Day-<< engineer Technology >>

Tags: Linux administrator technology Linux engineers Technology Linux cloud computing Shenzhen Cloud computing Sen Wang Cloud computing operations engineer? security-enhanced Linux– The NSA National Security Agency led development, a set of enhanced Linux systemsFull-force access control system– integrated into the Linux kernel (2.6 and above) running–RHEL7 based on SELinux system for users, processes, directories and filesProvides a pre-set protectio

Simple optimization of Linux systems

/wkiom1khbr7hmsg6aadrxegk2fw780.png "/>Do not use the password when you log in via SSH. Of course password So yes the default is YesD, prohibit DNS parsing650) this.width=650; "title=" 4.png "alt=" Wkiom1khb_oii5z4aacjnwn2qxy917.png "src=" https://s3.51cto.com/wyfs02/M02/ 93/05/wkiom1khb_oii5z4aacjnwn2qxy917.png "/>Turn the DNS off, you can speed up the link.SELinuxSELinux is an enforced access control (MAC) security system based on the domain-type model (DOMAIN-TYPE), which is written by the

SELinux tolerant mode (permissive) forced mode (enforcing) off (disabled) conversion between several modes

status:enabledSELINUXFS Mount:/selinuxCurrent Mode:permissiveMode from config file:enforcingPolicy version:21Policy from config file:targetedGetenforce/setenforce viewing and setting the current operating mode of SELinux#-----------------------------------------------------------------------Discovery service start, stop immediately, find information on the Internet, find the installation to disable SELinux before installing MySQL, the steps are:1. Turn off SELinux and restart the system;2. Inst

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