eG Monitoring
 

Measures reported by HanaHostMemTest

By proactively detecting a potential memory contention on a SAP HANA server, administrators can easily avert slowdowns or outages of the SAP HANA database server. The HanaHostMemTest test helps administrators in this exercise. This test reports how well the SAP HANA server uses the physical and swap memory allocated to it, and leads administrators to abnormal memory usage patterns (if any).

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
totalPhysicalMemory Indicates the total amount of physical memory allocated for the SAP HANA database host. MB  
freePhysicalMemory Indicates the amount of physical memory that is currently available on the SAP HANA database host. MB A high value is desired for this measure.
usedPhysicalMemory Indicates the amount of physical memory that is currently used by the SAP HANA database host. MB Ideally, the value of this measure should be low. A consistent increase in this value could be a cause for some serious concern, as it indicates a gradual, but steady erosion of valuable memory resources. If this unhealthy trend is not repaired soon, it could severely hamper server performance, causing anything from a slowdown to a complete system meltdown.
totalSwapSpace Indicates the total amount of swap memory allocated for the SAP HANA database host. MB Swap space is space on a hard disk used as the virtual memory extension of a computer's real memory (RAM). The least recently used files in RAM can be "swapped out" to the hard disk until they are needed later so that new files can be "swapped in" to RAM.
freeSwapSpace Indicates the amount of swap memory that is currently available for the SAP HANA database host. MB Ideally, the value of this measure should be high, as having an appropriate amount of swap space is important for optimal system performance.
usedSwapSpace Indicates the amount of swap memory that is currently used by the SAP HANA database host. MB A consistent rise in the value of this measure is a cause for concern.
freePhysicalMemoryPercent Indicates the percentage of physical memory that is currently available on the SAP HANA database host. Percent A high value is desired for this measure. A consistent drop in this value is a sign that physical memory is being over-utilized by the server.
freeSwapSpacePercent Indicates the percentage of swap memory that is currently available on the SAP HANA database host. Percent A very low value indicates that the swap space configured may not be sufficient. A value close to 100% may imply that the swap space configured may be too large.