15.10 - Teradata Virtual Storage (VS): Allocation Columns - Teradata Database

Teradata Database Resource Usage Macros and Tables

Product
Teradata Database
Release Number
15.10
Published
April 2016
Language
English (United States)
Last Update
2018-05-17
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These columns identify the allocation statistics reported by the Allocator process.

Column Name Mode Description Data Type
ExtAllocHot count Number of hot allocations made in the current log period. A hot allocation is an allocation whose estimated temperature falls within the pre-defined hot temperature range.

The cylinder resides in some disk storage location and holds some data. Temperature is the frequency of access to the data by I/O independent of where the data resides.

FLOAT
ExtAllocNonPacing count Number of non-pacing allocations made in the current log period. A non-pacing allocation is an allocation whose data access affects neither system performance nor individual query performance. FLOAT
ExtAllocStatic count Number of static allocations made in the current log period. A static allocation is an allocation whose requested temperature is used and the measured temperature is ignored during migration. FLOAT
ExtAllocSystemPacing count Number of system pacing allocations made in the current log period. A system pacing allocation is an allocation whose data access affects system performance. FLOAT
ExtAllocTotal count Total number of allocations made in the current log period. A number of computations can be derived. For example:

Cold Allocation = ExtAllocTotal – ExtAllocHot – ExtAllocWarm

QueryPacing Allocation = ExtAllocTotal – ExtAllocNonPacing – ExtAllocSystemPacing

Dynamic Allocation = ExtAllocTotal - ExtAllocStatic

FLOAT
ExtAllocWarm count Number of warm allocations made in the current log period. A warm allocation is an allocation whose estimated temperature falls within the pre-defined warm temperature range.

The cylinder resides in some disk storage location and holds some data. Temperature is the frequency of access to the data by I/O independent of where the data resides.

FLOAT