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  • 444.Counters of SQL Server 2005

    1. Basic knowleadge about SQL Server Performance Counter
    Category Counter Bottlenecks
    Memory Memory: Pages/sec measures te number of pages per second that are paged out from RAM to Virtual memory on the hard disk. High
    Memory: Available Bytes measures the amount of free physical memory on a server.<5Mb
    SQL Server: Buffer Manager: Buffer Cache Hit Ratio indicates how often SQL Server accesses the buffer rather than the hard disk to get data. <90%
    Physical Disk : Disk Read/sec High
    Physical Disk : Disk Write/sec High
    Disk Physical Disk: % Disk Time Messure the pressure on a physical hard disk array. >55%
    Physical Disk: Avg. Disk Queue Length if it exceed 2 for each individual disk drive in an array. >10Min
    Physical Disk: % Free Space <15%, should alert the administrator
      Logical Disk: % Free Space <15%, should alert the administrator
    Processor Processor: % Processor Time >80% for continuous periods of 10Min
    Processor: Processor Queue Length >2 per CPU for continuous periods of 10Min
    Network Network Interface: Bytes Received/sec shows the rate at which bytes are received over each network adapter.
    Network Interface: Bytes Sent/sec shows the rate at which bytes are sent over each network adapter.
    Netwok Interface: Bytes/sec total level of network traffic both to and from a server.
    Netwok Interface: Output Queue Length shows the length of the output packet queue in packets. >2
    User Connections SQL Server: Genereal Statistics: User Connections shows the number of user connections, not the number of users currently connected to Server
    2. Practise

    There is one vitrul PC (Windows 2003 Entperise. T7500 2.2G, 256MB RAM), which hosts a SQL Server 2005.
    When the SQL Server is idle, whose performance is dicated as the following figure

    When i execute the following T-SQL, whose performance is shown here:

    Then, we look up anohter case, what can you infor from it?

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  • 原文地址:https://www.cnblogs.com/yang_sy/p/1449069.html
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