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Tags: http java using OS IO data ar CTIThe purpose of this test is to verify the performance of the current common database connection pool.TestCase Connection conn = dataSource.getConnection(); PreparedStatement stmt = conn.preparedStatement("select 1"); ResultSet rs = stmt.executeQuery(); while (rs.next()) { } rs.close(); stmt.close(); conn.close(); Test Codehttps://github.com/alibaba/druid/blob/master/src/test/java/com/alibaba/druid/benckmark/pool/case1.java Test Config

existing Core 2 Quad Q6600 at the end of the second quarter of 2007, Down from $851 per thousand to $530 trillion, there are indications that the price of dual-core processors will also fall sharply. Both Intel and AMD have made further explicit their "dual-core" products, including Intel's Xeon Dempsey and dual-core Itanium Montecito, AMD's 4-core OPTERON,IBM Power6 and Sun's Niagara II have all appeared in succession, Formed a dual-core-led, to mul

, disk I/O bandwidth and I/O performance. Powerleader, the basic idea of system design is put forward through multiple verification. By placing the WWW server, authentication server, billing server, database server, Management Server, management station and streaming media server group in the center of the provincial IDC, the centralized management and unified billing of the center, the unified portal to provide services to the whole district users, the user in the Center unified authentication

Tags: case log is architecture transaction reserved disk array Xeon SpaceIn the Apache, PHP, MySQL architecture, MySQL has the greatest impact on performance and is a key core. For the discuz! Forum program is also the case, MySQL settings are reasonable optimization, directly affect the speed and capacity of the forum! At the same time, MySQL is also the most difficult part of optimization, not only need to understand some of the MySQL expertise, but

address this constraint, consider the following solutions: Using the raid-0+1 disk array, it is important not to try to use Raid-5,mysql on the RAID-5 disk array as quickly as you might expect.②CPU for MySQL applications, it is recommended to use S.M.P. Architecture's multi-symmetric CPU, for example: two Intel Xeon 3.6GHz CPUs can be used, now I would rather recommend 4U servers dedicated to database server, not just for MySQL.③ physical memory for

Tags: article tab disk condition mod mysql-5.5 stop vue NTS First, the hardware environment Master:dell R720 Intel (R) Xeon (r) CPU e5-2640 v2 @ 2.00GHz MEM 64G. Disk 4*2.5 SAS Network Slave:dell R720 Intel (R) Xeon (r) CPU e5-2640 v2 @ 2.00GHz MEM 64g,disk 4*2.5 SAS network -Gigabit Second, the SOFTWARE environment System software: master:cento5.8 slave:cento5.8 Database software: mysql-5.5.10 Iii. the p

information in the Cat/proc/cpuinfoprocessor The ID of the logical processor. ID of the processor that physical ID physically encapsulates. the ID of the core ID for each key. CPU Cores The number of cores in the same physically encapsulated processor. siblings the number of logical processors in the same physically encapsulated processor. 1 Viewing the number of physical CPUs#cat/proc/cpuinfo |grep "Physical id" |sort |uniq|wc–l2. View the number of logical CPUs#cat/proc/cpuinfo |grep "Processo

complex query operations, the amount of read and write disk can be imagined. Therefore, the disk I/O is generally considered to be one of the biggest constraints on MySQL performance, for the average daily access to more than 1 million PV discuz! forum, due to disk I/O constraints, MySQL performance will be very low! To address this constraint, consider the following solutions: Using the raid-0+1 disk array, it is important not to try to use Raid-5,mysql on the RAID-5 disk array as quickly as y

number of logical CPUs#cat/proc/cpuinfo |grep "Processor" |wc-l3. View CPU is a few cores#cat/proc/cpuinfo |grep "Cores" |uniq4. Check the CPU frequency#cat/proc/cpuinfo |grep mhz|uniq5 View CPU Models# Cat/proc/cpuinfo | grep ' model name ' |uniqModel Name:intel (R) Xeon (r) CPU E5630 @ 2.53GHzSummary: The server has 2 4-core CPUs, Model Intel (R) Xeon (r) CPU E5630 @ 2.53GHzView Memory command under AIXk

large number of complex query operations every second. You can imagine the disk read/write volume. Therefore, we usually think that disk I/O is one of the biggest factors restricting MySQL performance. For Discuz with an average daily access volume of more than 1 million PVS! Forum, due to disk I/O constraints, MySQL performance will be very low! To solve this problem, consider the following solutions: Use a RAID-0 + 1 disk array. Do not try RAID-5, mySQL's efficiency on RAID-5 disk arrays will

reflected. On systems using Intel processor hyper-Threading Technology (HT technology), there are currently two execution pipelines on each processor core. The latest multi-core processor has two processor cores on each chip. Intel pointed out that chips may have multiple cores in the future, most of which are due to higher performance and will not fundamentally increase the consumption of heat or power. Therefore, the number of pipelines will increase. According to the arithmetic recommendati

performs a large number of complex query operations every second. You can imagine the disk read/write volume. Therefore, we usually think that disk I/O is one of the biggest factors restricting MySQL performance. For Discuz with an average daily access volume of more than 1 million PVS! Forum, due to disk I/O constraints, MySQL performance will be very low! To solve this problem, consider the following solutions: Use a RAID-0 + 1 disk array. Do not try RAID-5, the efficiency of MySQL on the RAI

automatically call The modprobe command to load the required modules. This is a great feature, of course, you must choose Y. Part 4 04. Processor type and features ---> Processor type 04.01. Subarchitecture Type (PC-compatible) ---> the main purpose of this option is to enable Linux to support multiple PC standards, generally, the pc we use follows the so-called IBM compatibility structure (pc/). This option allows you to select other architectures. We generally choose PC-compatible. Sele

First, the hardware compositionMotherboard CPU hard disk memory graphics card NIC Optical drive chassis monitor Keyboard mouseSecond, Hardware introduction1. CPU ProcessorClock frequency: The CPU core works64-bit technology: Processor 1 times can run 64bit of dataCache: Alleviates the speed difference between CPU and memoryMulti-core technology: one processor on a single semiconductor has multiple processing cores of the same functionInterface: Number of pins INTEL 478 775 1366AMD 939 940 938Com

Fedora18 was released. One of the most exciting features in virtualization is online snapshots. In the past, KVM used to take snapshots and the virtual opportunity was automatically paused. Now, this problem has been overcome. Lab environment: hardware Intel (R) Xeon (R) CPUE5540@2.53GHz6G memory 80Gsata hard drive software fedora18kernel3.7.2-204. fc18.x8 Fedora 18 released, one of the most exciting features of virtualization is online snapshot. In t

MySQL performance. For Discuz with an average daily access volume of more than 1 million PVS! Forum, due to disk I/O constraints, MySQL performance will be very low! To solve this problem in the CentOS system, consider the following solutions: Use a RAID-0 + 1 disk array. Do not try RAID-5, the efficiency of MySQL on the RAID-5 disk array is not as fast as you expected;Abandon traditional hard disks and use faster flash storage devices. After Discuz! The company's technical engineering tests sh