cacheReadAheadsPerSec
WINDOWS-NT-PERFORMANCE ·
.1.3.6.1.4.1.311.1.1.3.1.1.19.23
Object
Read Aheads/sec is the frequency of Cache reads where the Cache detects sequential access to a file. The read aheads permit the data to be transferred in larger blocks than those being requested by the application, reducing the overhead per access.
Context
- MIB
- WINDOWS-NT-PERFORMANCE
- OID
.1.3.6.1.4.1.311.1.1.3.1.1.19.23- Type
- scalar
- Access
- readonly
- Status
- mandatory
- Parent
- cache
- Siblings
- 26
Syntax
RFC1155-SMICounter
- Source
- RFC1155-SMICounter
- Base type
Unsigned32
Values & Constraints
Type Constraints
range: 0..4294967295
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| cacheDataMapsPerSec mandatory Data Maps/sec is the frequency that a file system such as NTFS or HPFS maps a page of a file into the Cache to read the page. | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.1 |
| cacheAsyncPinReadsPerSec mandatory Async Pin Reads/sec is the frequency of reading data into the Cache preparatory to writing the data back to disk. Pages read in this fashion are pinned in memory at the completi… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.10 |
| cachePinReadHitsPercent mandatory Pin Read Hits is the percentage of Cache Pin Read requests that hit the Cache, i.e., did not require a disk read in order to provide access to the page in the Cache. While pinned… | scalar | Integer32 | .1.3.6.1.4.1.311.1.1.3.1.1.19.11 |
| cacheCopyReadsPerSec mandatory Copy Reads/sec is the frequency of reads from Cache pages that involve a memory copy of the data from the Cache to the application's buffer. The LAN Redirector uses this method f… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.13 |
| cacheSyncCopyReadsPerSec mandatory Sync Copy Reads/sec is the frequency of reads from Cache pages that involve a memory copy of the data from the Cache to the application's buffer. The file system will not regain … | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.14 |
| cacheAsyncCopyReadsPerSec mandatory Async Copy Reads/sec is the frequency of reads from Cache pages that involve a memory copy of the data from the Cache to the application's buffer. The application will regain con… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.15 |
| cacheCopyReadHitsPercent mandatory Copy Read Hits is the percentage of Cache Copy Read requests that hit the Cache, i.e., did not require a disk read in order to provide access to the page in the Cache. A Copy Rea… | scalar | Integer32 | .1.3.6.1.4.1.311.1.1.3.1.1.19.16 |
| cacheMDLReadsPerSec mandatory MDL Reads/sec is the frequency of reads from Cache pages that use a Memory Descriptor List (MDL) to access the data. The MDL contains the physical address of each page involved i… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.18 |
| cacheSyncMDLReadsPerSec mandatory Sync MDL Reads/sec is the frequency of reads from Cache pages that use a Memory Descriptor List (MDL) to access the pages. The MDL contains the physical address of each page in t… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.19 |
| cacheSyncDataMapsPerSec mandatory Sync Data Maps/sec counts the frequency that a file system such as NTFS or HPFS maps a page of a file into the Cache to read the page, and wishes to wait for the Cache to retrieve… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.2 |
| cacheAsyncMDLReadsPerSec mandatory Async MDL Reads/sec is the frequency of reads from Cache pages using a Memory Descriptor List (MDL) to access the pages. The MDL contains the physical address of each page in the… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.20 |
| cacheMDLReadHitsPercent mandatory MDL Read Hits is the percentage of Cache Memory Descriptor List (MDL) Read requests that hit the Cache, i.e., did not require disk accesses in order to provide memory access to th… | scalar | Integer32 | .1.3.6.1.4.1.311.1.1.3.1.1.19.21 |
| cacheFastReadsPerSec mandatory Fast Reads/sec is the frequency of reads from Cache pages that bypass the installed file system and retrieve the data directly from the Cache. Normally, file I/O requests invoke … | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.24 |
| cacheSyncFastReadsPerSec mandatory Sync Fast Reads/sec is the frequency of reads from Cache pages that bypass the installed file system and retrieve the data directly from the Cache. Normally, file I/O requests in… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.25 |
| cacheAsyncFastReadsPerSec mandatory Async Fast Reads/sec is the frequency of reads from Cache pages that bypass the installed file system and retrieve the data directly from the Cache. Normally, file I/O requests w… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.26 |
| cacheFastReadResourceMissesPerSec mandatory Fast Read Resource Misses/sec is the frequency of Cache misses necessitated by the lack of available resources to satisfy the request. | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.27 |
| cacheFastReadNotPossiblesPerSec mandatory Fast Read Not Possibles/sec is the frequency of attempts by an Application Program Interface (API) function call to bypass the file system to get at Cache data, that could not be … | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.28 |
| cacheLazyWriteFlushesPerSec mandatory Lazy Write Flushes/sec is the frequency the Cache's Lazy Write thread has written to disk. Lazy Writing is the process of updating the disk after the page has been changed in mem… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.29 |
| cacheAsyncDataMapsPerSec mandatory Async Data Maps/sec is the frequency that an application using a file system such as NTFS or HPFS to map a page of a file into the Cache to read the page, and does not wish to wai… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.3 |
| cacheLazyWritePagesPerSec mandatory Lazy Write Pages/sec is the frequency the Cache's Lazy Write thread has written to disk. Lazy Writing is the process of updating the disk after the page has been changed in memor… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.30 |
| cacheDataFlushesPerSec mandatory Data Flushes/sec is the frequency the Cache has flushed its contents to disk as the result of a request to flush or to satisfy a write-through file write request. More than one p… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.31 |
| cacheDataFlushPagesPerSec mandatory Data Flush Pages/sec is the number of pages the Cache has flushed to disk as a result of a request to flush or to satisfy a write-through file write request. More than one page c… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.32 |
| cacheDataMapHitsPercent mandatory Data Map Hits is the percentage of Data Maps in the Cache that could be resolved without having to retrieve a page from the disk, i.e. the page was already in physical memory. | scalar | Integer32 | .1.3.6.1.4.1.311.1.1.3.1.1.19.4 |
| cacheDataMapPinsPerSec mandatory Data Map Pins/sec is the frequency of Data Maps in the Cache that resulted in pinning a page in main memory, an action usually preparatory to writing to the file on disk. While p… | scalar | Integer32 | .1.3.6.1.4.1.311.1.1.3.1.1.19.6 |
| cachePinReadsPerSec mandatory Pin Reads/sec is the frequency of reading data into the Cache preparatory to writing the data back to disk. Pages read in this fashion are pinned in memory at the completion of t… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.8 |
| cacheSyncPinReadsPerSec mandatory Sync Pin Reads/sec is the frequency of reading data into the Cache preparatory to writing the data back to disk. Pages read in this fashion are pinned in memory at the completion… | scalar | RFC1155-SMICounter | .1.3.6.1.4.1.311.1.1.3.1.1.19.9 |