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Maridb10.0.15oncentos6.5 install ************************************** **************************************** 1. system ************************************** **************************************** -------- 1. install desktop and select Custom Maridb 10.0.15 on centos 6.5 installation ********************************** **************************************** * *** 1. system ************************************** **************************************** -------- 1. install desktop and selec

1. For SSH and FTP, first install the server and then the client2. Example: Install the vsftpd serviceStep 1: first check whether vsftpd RPM packages have been installedRpm-Qa | grep vsftpdStep 2: mount the ISO image to the hard disk1. First, create a directory CDROM under the/Media Directory and mount the CD to the system/Media/CDROM.Mkdir/Media/CDROMMount/dev/CDROM/Media/CDROM/2. Enter the/etc/yum. Repos. d directory CentOS-Base.repo rename. CD/etc/yum. Repos.

read)/logical read Do not forget that the number of physical reads may vary greatly, and the number of physical reads for the second and subsequent executions will be greatly reduced, because the cache is loaded during the first execution, the number of physical reads is small. For this reason, you may think that there is no need to do a lot of analysis for the pre-query-based physical reads. When you view a single query, the number of logical reads is usually more important, because the inform

-- Performance bottleneck of sqlserverHttp://hi.baidu.com/cwh_blog/item/a85e86ddb46fbd57d73aae4fHttp://msdn.microsoft.com/zh-cn/magazine/cc135978.aspx-- The performance of many applications may be caused by poor database query syntax. How do we know where the bottleneck is? Basically, SQL Server 2005 collects the queried data, which is stored in the memory and starts to accumulate after each restart. In other words, after the instance is restarted, the data disappears. -- The data includes the d

client waits until the operations on the remote backup storage are completed.An asynchronous image is a "Give and remove" method. The data is sent to the backup storage as available resources, but the customer will not wait for confirmation before continuing the operation.Check whether database logs are growing rapidly and perform proper processing. I don't know anything else. 21. sqlserver profiler is already very powerful; DMV (dynamic management v

We all know that the data accessed by SQL Server is stored in the buffer pool, but do you know the data density used in the buffer pool? If the density of data to be queried in the buffer pool is small, it means that a lot of useless memory is occupied, resulting in a waste of memory. So how can we view the data density in the buffer pool? In SQL server2005, SYS. dm_ OS _buffer_descriptors DMV is provided. You can use this view to query information o

During running, you can see that SQLdiag enables Perfmon (AddingPerfmon counters) and Trace (Starting Profiler Trace) After the problem is tracked, press Ctrl + C to stop log collection. Some information is collected before the tool is disabled, so it may take a while to completely stop In the directory F: \ SQLDIAOUT, you can see the following information: (1) SQL Trace file (XXXX_sp_trace.trc) Token) (3) For Windows Performance Logs (SQLdiag. blg), the file cannot be opened with the p

SQL Server OS, thread scheduling adopts the cooperative mode instead of the preemption mode. This is because all the tasks in these databases are within the SandBox of SQL Server. SQL Server fully believes in its threads, so unless the thread voluntarily gives up the CPU, SQL Server OS will not forcibly deprive the CPU of the thread. In this way, although the Worker switchover is still performed through the Context Switch of Windows, this cooperation mode will greatly reduce the number of Conte

before using these statements to clear the cache, especially in the production environment. These have a great impact on performance. After clearing the cache, SQL Server needs to re-read data from the data page. In addition, SQL Server needs to generate a new execution plan. Therefore, you need to be clear about the impact on the production or test environment before cleaning. 　　 Dynamic management object SQL Server 2005 introduces dynamic management objects, such as

which require memory from non-bpool region will fail. When a time, these problems go away automatically without any action taken. this indicates an intermittent problem when at a certain point in time; there was virtual memory pressure which resulted in abve messages being printed to the SQL errorlog. Dealing with vas fragmentation or running out of VAS on SQL Server 2000 was rather painful and required setting up additional Debugging techniques to get down to the bottom of the issue. you might

.internal_objects_alloc_page_count desc There are four key information: Session_id: Wait a moment to query information about the session. Internal_objects_alloc_page_count: Data Page allocated to the internal object of the session Internal_objects_dealloc_page_count: released data page Login_name: The Login Name of the session From internal_objects_alloc_page_count and internal_objects_dealloc_page_count, we can see that 7236696 pages are allocated to the session, and the calculation is as f

performance standards for the current SQL Server System and quantifies them as much as possible. This serves as the basis for evaluating the effect. For example, you can use a performance counter to obtain the current memory, CPU peak, and average value. Another example is to run a complex query and record its time consumption. 2)Stage 2:Optimize System Resources For example, enable AWE for a 32-bit system. This is the simplest and most meaningful job. It can bring obvious results to Performan

, at this point, streamed from SalesOrderDetail directly into MyTable. rather, it is streamed from SalesOrderDetail into the Parameter Table. and the Parameter Table, as it turns out, is in actuality a hidden temporary table. and not until all of the data has streamed into that hidden temporary table is control resumed by the EXEC context, and only then does the data start moving into its final home. The natural question you might be asking yourself at this point is, just how much overhead does

an article: Why does PREEMPTIVE_ OS _GETPROCADDRESS Show a Large Accumulation? This is a bug in SQL Server 2008. It is caused by the execution of the extended storage process, which leads to the continuous accumulation of the type PREEMPTIVE_ OS _GETPROCADDRESS. As mentioned above, calculate the approximate execution time of the extended stored procedure: declare @WaitTime bigintselect @WaitTime = wait_time_ms from sys.dm_os_wait_stats where wait_type = 'MSQL_XP'select @WaitTime - wait_time_

= enforcing/SELINUX = disabled/G'/etc/selinux/config # permanently disabled, reboot required 2. Yum for source Vim/etc/resolv. confnameserver 180.76.76.76 # Baidu open-source DNSyum-y install wgetcd/etc/yum. repos. dmv CentOS-Base.repo CentOS-Base.repo.bak # backup wget http://mirrors.163.com/.help/CentOS6-Base-163.repo # swap 163 source yum install epel-release # Extend update package yum makecache # generate cache # yum-y upgrade # update all packa

use the DBCC command, DMV, and DMF to monitor which statements are using tempdb. To make the results simple, we need to restart SQL server before testing. Then we establish a connection (connection A) in management studio and input the following statement. These statements use the space of tempdb. Select @ spid Go Use adventureworks Go Select getdate () Go Select * into # mysalesorderdetail From sales. salesorderdetail -- Cre

connection data packet is 4 kb, unless the client is specially set to exceed 8 KB (not recommended)Third-party CODE memory applications are generally applied in stolen mode. For example, the CLR may apply in reserved/commit mode.Each thread's memory is applied in MB format, and is naturally stored in memtoleave.The reason why I spent so much time talking about the memory classification of SQL Server is that SQL Server, especially the 32-bit SQL Server, has different application sizes for differ

Cannot I connect to the Internet after the minimum installation? Find the network configuration method: Under the command line Ifconfig eth0 192.168.137.117 netmask 255.255.255.0route add default GW 192.168.137.1echo "nameserver 218.104.111.114">/etc/resolv. conf The above method is too stupid to directly change VI/etc/sysconfig/network-scrip/ifcfg-eth0 Change onboot to yes. Install wget Yum install wget Change to 163 Source CD/etc/yum. Repos. DMV