oltp

Today in the group to see someone said unfamiliar InnoDB the Ibdata (data file) and Ib_logfile (transaction log) files were deleted by mistake. Do not know how to solve. I didn't know what to do at that time. Later access to relevant information. Finally find a solution. In fact, recovery is quite simple. We find it difficult when we don't know it. Who says it's not?Below we will simulate the production environment, the human deletion of data files and redo log files. Then specify the recovery s

Tags: har multiple libtool multithreading General option CTS 5.4 PreparationMySQL Performance test tool-sysbench Sysbench IntroductionSysbench is a cross-platform benchmarking tool that supports multiple threads, supports multiple databases, and includes several types of tests, including the following:CPU PerformanceDisk IO PerformanceScheduler performancememory allocation and transfer speedPOSIX threading PerformanceDatabase performance (OLTP benchma

Tags: style blog http io os using AR strong forMySQL Benchmark test toolMysqlslap, Sysbench, Super SmackMysqlslap's use of the MySQL website gives an introductionSuper Smack is a powerful tool for server stress testingSysbench is the MySQL benchmark tool.Sysbench InstallationDirect Yum InstallationTest environmentMysql> SELECT VERSION (); +-----------+| VERSION () |+-----------+| 5.1.73 |+-----------+1 row in Set (0.00 sec)　　1: Test CPU[Email protected] ~]# sysbench--test=cpu--cpu-max-prime=1

Tags: sysbenchSysbench-dependent packages: M4 autoconf Automake LibtoolYum Install M4 autoconf automake LibtoolInstallation:Tar zxvf sysbench-0.5.tar.gzCD sysbench-0.5chmod +x autogen.sh./autogen.sh./configure--with-mysql-includes=/usr/local/mysql/include--with-mysql-libs=/usr/local/mysql/libMake make InstallTo construct the data:Sysbench--test=/usr/local/src/sysbench-0.5/sysbench/tests/db/oltp.lua--oltp_secondary=on--oltp_tables_count=10 --oltp-tabl

fact we started to introduce and use MySQL database at the end of 2013, a year or more earlier than PostgreSQL. But finally, after the evaluation and practice test, it is found that PostgreSQL is more suitable for most financial applications, so it chooses the PostgreSQL database as the mainstream open source database of technology. The bread here contains many factors. Payment scenarios are a more focused part of the financial world. Ping An group is a comprehensive financial services busine

Imooc; creating a DatabaseGrant Allprivileges on * * to [email protected] ' localhost ' identified by ' 123456 '; Create User name Password permissionsGo to the script directory tests/db ls-l *.luaPreparing test dataSysbench--test=./oltp.lua--mysql-table-engine=innodb--oltp-table-size=10000--mysql-db=immooc--mysql-user= Sbtest--mysql-password=123456--oltp-tables-count=10--mysql-socket=/usr/local/mysql/data

shown below: in this report, there are two parameters that deserve our attention, namely, the number of requests per second and the total throughput.It is 785.16 Requests/sec and 12.268 Mb/sec. These two parameters are very helpful for evaluating disk performance. Complete the testAfter the test, you need to delete the test data: sysbench -- test = fileio cleanup (3) oltp test first generates the data: sysbench -- test =

The sample data after SQLServer2005 is "AdventureWorks", which must be downloaded from the codeplex website. The purpose of this design is to allocate unnecessary users and permissions to the production database. In addition to the differences in versions, you can also distinguish between OLTP and DW from the following URLs. Select the corresponding version for download. In general, backward compatibility, so The sample data after SQL Server 2005 is n

used to automatically set the thresholds for alarms and critical alarms from the statistical information obtained from the metric values captured by the baseline in the mobile window. These statistics are generated every week, and new thresholds may be generated due to changes in system performance over time. For example, many databases are an OLTP system during the day, and some batch processes (such as generating reports) need to be executed at nig

Test parameters: sysbench -- testrootsysbench0.5sysbenchtestsdbinsert. lua -- mysql-table-engineinnodb -- oltp-table-size1000000-max-requests0 -- max-time Test parameter: sysbench -- test =/root/sysbench0.5/sysbench/tests/db/insert. lua -- mysql-table-engine = innodb -- oltp-table-size = 1000000 -- max-requests = 0 -- max-time = Test parameters:Sysbench -- test =/root/sysbench0.5/sysbench/tests/db/insert

The In-Memory option (DBIM) of OracleDB12c loads data from all the rows In the table into the Memory. Why can't I just put frequently accessed data blocks into the Memory like BufferCache? The access modes of memory columnar storage and BufferCache are different because they support different access modes. For BufferCache, OLTP applications are supported, and the access mode is The In-Memory option (DBIM) of Oracle DB 12c loads the data of all rows In

databases are an OLTP system during the day, and some batch processes (such as generating reports) need to be executed at night ). The performance measurement of each transaction response time may be useful for detecting OLTP performance degradation issues during the day, but this threshold is often too low for batch work and frequent alerts are triggered. The adaptive threshold can detect this workload mo

example, for the OLTP system, use dedicated connections, and for websites, you can use shared connections. So can we use shared connections in the OLTP system? If it can be used, can it improve performance? The OLTP system generally has many long transactions and large transactions. For example, a user must perform several operations as a transaction. In this ca

: number of transactions executed concurrentlyTns-alias-list: list of tested instances. To test multiple instances, separate them by commas.Mode: running mode. See the preceding section.Batchsize: Optional. It is used in IDS and DIO modes. The default value is 1000. In IDS and DIO mode, when the number of inserted records reaches batchsize, It is submitted once. We recommend that you use 1, 2, 3, 5, and 10 warehouses to test 50000 concurrent transactions in a single-node database.We recommend th

1. Memory Optimization tableIn-memory OLTP is a memory-optimized database engine that is integrated into the SQL Server engine.OLTP in memory has been optimized for OLTP. There are many restrictions on the external applications of Transact-SQL supported by OLTP in the memory.2. SQL Server data files in Windows AzureSQL Server data files in Windows Azure provide l

One way for oracle12c to manage job resources: oracle12c job resources Database: 12.1.0.2, rac, cdb Mode I am responsible for moving two cdb clusters of 12.1.0.2, one on aix and the other on linux. Unfortunately, they are both hybrid and have more than 100 TB of data. Because 12c was already delivered by other departments, I was not very familiar with 12c before, but I still want to see if I can maximize performance without sharding. The result is not good, because some applications that prefer

Suggestions on the size of the initial SGA database and the size of the PGA database, sgapga1. Background information Many new business systems are launched, and most DBAs do not understand the business, so they are bored with the header database creation. The SGA value is set to a large value, and the PGA is set to a large value. After a period of operation, it may be because this value is randomly specified. For example, if the SGA + PGA is greater than the total physical memory, the SGA value

may be damaged. Of course, it is okay to back up the database.. I have not modified it here. Use the default position and press "Next" to continue. Select the average MySQL access volume of your website and the number of connections at the same time, "demo-support (DSS)/OLAP (about 20 )","Online transaction processing (OLTP) (about 500)" and "manual setting (manually set, and input a number by yourself )",Here I select "online transaction processing

8.2 write efficient queries Efficient SQL code mainly refers to the efficient query using the SELECT command. The SELECT command allows the WHERE clause to reduce the amount of data read. The where clause is used to return (or not return) specific records. The update command and the DELETE command can also have a where clause. Therefore, using the WHERE clause can reduce the amount of data access and improve the performance of the two commands. Tip: It is usually the work of developers and admin

Author: Piner original address:Http://www.ixdba.com/html/y2007/m06/125-orion-storage-test.html Orion,OracleProvided by the company, it is used to simulate the database operation mechanism to test the excellent storage performance.IoStore the test software.OracleSimulate random OLTP operations (TestIops) Or OLAP continuous operations (test throughput ). First look at the softwareAnd description: Orion isOracleI/O numbers calibration tool designed to si