The following columns can be obtained from the tdheatmap function.
General Fields
TheDateThe date the heatmap was produced.
TheTimeThe time the heatmap was produced.
AmpNumberThe VPROC identifier of the AMP on which the heatmap was originally produced.
DatabaseNameThe name of the database.
TableNameThe name of the table.
CylinderId(Lsw+Msw)The unique identifier of cylinder.
Starting Table
StartTableIdStartTableIdUniq and StartTableIdTypeAndIndex.
StartTableIdUniqThe unique ID that identifies the starting table. It can be joined to dbc.tvm.tvmid.
StartTableIdTypeAndIndexThe subtable type of the starting table: Primary, Fallback, Secondary. For example, 1024 is the Primary data, 1028 is the Secondary Index, 2048 is the Primary fallback.
StartPartitionInternal partition number of the starting row.
The rowId(hash0 + hash1 + uniq0 + uniq1) of the starting row.
Ending Table
EndTableIdEndTableIdUniq and EndTableTypeAndIndex.
EndTableIdUniqThe unique ID that identifies the ending table. It can be joined to dbc.tvm.tvmid.
EndTableTypeAndIndexSubtable type of the ending table: Primary, Fallback, Secondary. For example, 1024 is the Primary data, 1028 is the Secondary Index, 2048 is the Primary fallback.
EndPartitionInternal partition number of the ending row.
The row hash value (hash0 and hash1) of the ending row.
Temperature Information
TemperatureThe TVS temperature in the float point.
NormalizedTempInfoIf Temperature is greater than warmceiling, it is classified as ‘HOT’. Any Temperature between warmceiling and warmfloor is ‘WARM,’ and the rest is COLD.
RequestedTempInfoThe requested temperature by Vantage when File System requests the allocation of a cylinder.
TempPercentilePercentage value indicates how many percent permanent cylinders are colder than this cylinder.
TempWarmCeilingThe upper limit of the warm/hot temperature boundary.
TempWarmFloorThe lower limit of the warm/hot temperature boundary.
TempVeryHotFloorThe lowest temperature above which temperature can be considered to belong to VeryHotCache.
PercentFullPercentage value indicates how much percent of the extent is full.
TIM Cache
VeryHotCandidateYes or No. TVS identifies whether the selected cylinder is the hot candidate. If TIM is not activated, this column displays BLANK.
VeryHotCacheYes or No. The cylinder is (or is not) actually in VeryHotCache. If TIM is not activated, this column displays BLANK.
Storage Placement
GradeDescribes whether the cylinder storage media is SLOW, MEDIUM, or FAST. If TVS is not enabled on the system, this column displays BLANK.
MediaTypeSpecifies the cylinder storage media type as DISK, FILE, SSD, NETWORK, or OTHER. Each value indicates whether the data is on a rotating disk drive, a flat file, a solid state drive, a network-attached storage device, or another media type.
StorageClassSpecifies the cylinder storage media class as PRIMARY or SECONDARY. The default is PRIMARY.