Systems Management Empire MIB › Buffers Group › I/O Buffer Cache Group

I/O Buffer Cache Group

Use the I/O Buffer Cache group to track I/O buffer allocation and usage for basic disk I/O.

Class: ioBufferCache

You can also graph the values of these counters to detect peak periods of I/O buffer activity. The I/O Buffer Cache group lets you monitor the following information:

• Number of buffer read calls (numBreadRequests)
• Number of kernel buffer cache hits (numBreadHits)
• Number of times a kernel had to sleep for a buffer (numBufSleeps)
• Number of times an aged buffer was allocated (numAgeAlloc)
• Number of times an LRU buffer was allocated (numLRUAlloc)
• Minimum number of buffer headers allocated (minNumBufHdrs)
• Number of currently allocated buffers (numAllocBuf)
• Percentage of buffer read requests that result in a hit (ioBufferHitRate)