Performance counter shows extra than 100% % disk t
 

CPU:
1.System:% Total Processor Time average CPU utilization (too going on a agenda such as SQLserver Process% Processor Time)
2.System:% Processor Queue Length waiting processor digit of threads (natural range 1 apt 3 the number of cpu periods)
3.Processor:% User Time non-kernel applying consumes time (such for SQLServer or anti-virus software)
4.Processor:% Interrupts / Sec processor interrupts per second, the corresponding number (extra than 1000,GHD Pink Limited Edition, said there are ongoing problems, may be bad drivers, hardware, hardware memories overuse or a problem)
DISK (Physical Disk):
queue length counter
1.% Avg.Disk Queue Length trailing the sampling duration of time in the queue waiting for disk access requests and are quite service requests
2 .% Current Disk Queue Length is in a await state access to services and the number of requests
throughput counter
3.% Disk Bytes / Sec transfer rate measurements,GHD Purple Gift Set, the disk throughput is one important arrow of
4.% Disk Read Bytes / Sec
5.% Disk Write Bytes / Sec
utilization counter
6.% Disk Time
7.% Disk Read Time and% Disk Write Time for treatment disk drives to read / written request to the ratio of time
8.% Idle Time disk system does not process the request and the request queue is not the percentage of time
9.Disk Transfers / Sec Disk Reads / Sec Disk Writes / Sec
page counter
10.SQL Server: Buffer Manager: Cache Hit Ratio
11.SQL Server: Buffer Manager: Page Life Expectancy
12.SQL Server: Buffer Manager: Checkpoint Pages / Sec
13.SQL Server: Buffer Manager: Lazy Writes / Sec
14.Memory: Page / Sec
15.Memory: Page Reads / Sec Page Writes / Sec
other
16.% Avg.Disk Sec / Transfer report data displacement speed (seconds), measured the average time for every displacement (all round-trip time)
17.% Avg.Disk Sec / Read% Avg.Disk Sec / Write the report from the disk read / write speed of file (seconds)
18.% Avg.Disk Time report aboard the chose disk drive read and write requests for processing the percentage of time
19.% Avg.Disk Bytes / Transfer dimension input / output operations (Avg.Disk Bytes / Read Avg.Disk Bytes / Write)
(disk bottleneck: the number of high disk movement, continuous disk queue length, a lot of page swap)
Memory:
1.Available Mbytes how many memory namely currently obtainable (memory account Zeroed Free Standby space joined attach)
2.Pages/Sec must be read from disk,GHD IV Styling Set, or must written to disk to make apartment because additional pages of memories page number
3.Process:% Working Set assigned to the proper process to submit the sum of memory, which may embody physical memory currently in the shared memory and personal content
4.SQL Server: Buffer Manager: Cache Hit Ratio cache kick rate
5.SQL Server: Buffer Manager: Total Pages Total number of pages in the buffer pool
6.SQL Server: Buffer Manager: Total Server Memory (KB) namely SqlServer how many memory the server is currently using; Target Server Memory (KB) that SqlServer how much memory to scamper efficiently,GHD Red Styler, it is based on the number of buffers reserved SqlServer
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% disk time more than 100% of the analytical-Zee
phenomenon:
in LR, we can look the% disk time more than 100% of the phenomenon.
if the machine in a engaged state,GHD Blue Styler, This merit may exceed 100%, case in point, copying large files.

reasons:
cause for this phenomenon is the processor allows the operating system to use overlapped I / O, disk extravaganza counter use a 100 nanosecond precision counter to weigh the disk time, and then exhibited in agreement with the sampling frequency, sampling time may be behind more than 100%,GHD Salon Styler, case in point: 2 milliseconds in the 10 request, the sampling time of 10 milliseconds. If aggression disk, because the operating system to read and write to multiple disks, resulting in overlapping I / O, which makes% disk time is greater than 100%.

fact:
to measure the disk time and disk delays, you can use the emulating counter term, usually, if an of the following counter values ​​are greater than 20 milliseconds, then the disk is overloaded.
• Avg.Disk sec / Read
• avg.Disk sec / Write
• Avg.Disk sec / Transfer