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常用的性能计数器监控以及指标

原创 Linux操作系统 作者:hwtong 时间:2011-06-10 15:20:12 0 删除 编辑
Object Performance Counters Value Reference Comment
Memory Memory: Available MBytes   >256 Available Mbytes stands for free unallocated RAM and displays the amount of physical memory, in MB, available to processes running on the computer
Memory: Pages/sec   Should not always more than 0 Pages/sec is the number of pages read from the disk or written to the disk to resolve memory references to pages that were not in memory at the time of the reference.

Buffer SQL Server: Buffer Manager: Buffer Cache Hit Ratio   >90% This counter is an indication of how many page requests were found in
the buffer pool
SQL Server: Buffer Manager: Free Pages   >500 This counter indicates how many free pages SQL Server has for new page requests.
Sql ServerBuffer Manger:Page Life Expectancy   >300 This counter provides an indication of the time, in seconds, that a page
is expected to remain in the buffer pool before being flushed to disk
SQL Server Access Methods:Page Splits/sec   <20% Number of page splits per second that occur as the result of overflowing index pages.
CPU Processor: %Processor Time   Less than 90% This counter determines the percentage of time
each processor is busy.
System: Processor Queue Length   Should not more than 2 The processor queue length is a measure
of how many threads are sitting in a ready state waiting on a processor to become available
to run them
Physical Disk PhysicalDisk: Avg. Disk sec/Read   Less than 0.02 The counter gives information about average value on how fast your disk operates under read activity. 
PhysicalDisk: Avg. Disk sec/Read   Less than 0.02 The counter gives information about average value on how fast your disk operates under write activity.  
PhysicalDisk: %Disk Time   Less than 90% monitors the percentage of time that the disk is busy with read/write activity
PhysicalDisk: Current Disk Queue Length   Less than 1.5 to 2 times the number of spindles that make up the physical disk Check how many system requests are waiting for disk access.

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