Yes 的技術家: 一般性伺服器效能監控

一般性伺服器效能監控(若特別應用系統伺服器有不同的效能監控標準，例如：AD. Exchange, SQL, IIS等)，由微軟 Windows Server 產品專家於文件中提出重要監控之校能指標與相關監控值，節錄如下表：

Object	Counte	Preferred Value	Description
Processor	% Processor Time	<65%	This counter is the primary indicator of processor activity. High values many not necessarily be bad.
Processor	% Privileged Time	<75%	This counter indicates the percentage of time a thread runs in privileged mode. When your application calls operating system functions (for example to perform file or network I/O or to allocate memory), these operating system functions are executed in privileged mode.
System	Context Switches/sec	<5,000>	Context switching happens when a higher priority thread preempts a lower priority thread that is currently running or when a high priority thread blocks. High levels of context switching can occur when many threads share the same priority level. This often indicates that there are too many threads competing for the processors on the system. If you do not see much processor utilization and you see very low levels of context switching, it could indicate that threads are blocked.
Memory	Available Mbytes	>4MB or >20% of installed RAM	This indicates the amount of physical memory available to processes running on the computer
Memory	Page Reads/sec	Sustained values of more than five indicate a large number of page faults for read requests	This counter indicates that the working set of your process is too large for the physical memory and that it is paging to disk.
Memory	Page Input/Sec	<10>	Pages Input/sec is the rate at which pages are read from disk to resolve hard page faults. Hard page faults occur when a process refers to a page in virtual memory that is not in its working set or elsewhere in physical memory, and must be retrieved from disk.
Paging File	\% Usage	<70%	Percentage of the paging file committed
Paging File	\% Usage Peak	<70%	Highest percentage of the paging file committed
PhysicalDisk	Avg. Disk Queue Length	Should not be higher than the number of spindles plus two	This counter indicates the average number of both read and writes requests that were queued for the selected disk during the sample interval
PhysicalDisk	Avg. Disk sec/Read	Less than 10 ms – very good	This counter indicates the average time, in seconds, of a read of data from the disk
		Between 10-20 ms – okay
		Between 20-50 ms – slow, needs attention
		Greater than 50 ms – Serious I/O bottleneck
PhysicalDisk	Avg. Disk sec/Transfer	<18>	This counter indicates the time, in seconds, of the average disk transfer. This may indicate a large amount of disk fragmentation, slow disks, or disk failures
PhysicalDisk	Disk Writes/sec	Less than 10 ms – very good	This counter indicates the average time, in seconds, of a write of data from the disk
		Between 10-20 ms – okay
		Between 20-50 ms – slow, needs attention
		Greater than 50 ms – Serious I/O bottleneck
PhysicalDisk	%Disk Time	<50%	Represents the percentage of elapsed time that the selected disk drive was busy servicing read or write requests