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Goal
Solution
APPLIES TO:
Hyperion Essbase - Version 9.3.1.0.00 to 11.1.2.1.000 [Release
9.3 to 11.1]Information in this document applies to any
platform.*** Checked for Relevance 28-May-2014 ***
GOAL
What are the default and recommended values for the Database
Cache settings (Index Cache, Data File Cache and Data Cache)?
SOLUTION
The following information is pulled directly from the Essbase
Database Administrator's Guide. The recommended settings maynot
apply to all Essbase database models.
The default and recommended settings for the Index Cache:
Minimum Value: 1024 KB (1048576 bytes)
Default Value: Buffered I/O: 1024 KB (1048576 bytes)Direct I/O:
10240 KB (10485760 bytes)
Recommended Value: Combined size of all ess*.ind files, if
possible; as large as possible otherwise. Do not set this cache
size higher than the totalindex size, as no performance improvement
results.To determine the total index size, see Index Files on page
(1026). In general, if you are using direct I/O, make the
indexcache as large as system resources allow. If you are using
buffered I/O, make the index cache as small as possible.
The default and recommended settings for the Data Cache:
Minimum Value: 3072 KB (3145728 bytes)
Default Value: 3072 KB (3145728 bytes)
Recommended Value: 0.125 * the value of data file cache size.
Increase value if any of these conditions exist: Many concurrent
users are accessing different data blocks.Calculation scripts
contain functions on sparse ranges, and the functions require all
members of a range to be in memory(for example, when using @RANK
and @RANGE). For data load, the number of threads specified by the
DLTHREADSWRITE setting is very high and the expanded block size
islarge.
Note: Make the data cache as small as possible whether you are
using buffered I/O or direct I/O.For information on testing and
fine tuning cache settings, see Fine Tuning Cache Settings on page
(842).
The default and recommended settings for the Data File
Cache:
Minimum Value: Direct I/O: 10240 KB (10485760 bytes)
Default Value:Direct I/O: 32768 KB (33554432 bytes)
Document Details
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Last Update:
HOWTO
PUBLISHED
28/05/2014
28/05/2014
Related Products
Hyperion Essbase
Information Centers
Information Center: OracleHyperion Essbase [1344571.2]
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9/23/2014 Document 972966.1
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Direct I/O: 32768 KB (33554432 bytes)
Recommended Value: Combined size of all ess*.pag files, if
possible; otherwise as large as possible.This cache setting not
used if Essbase is set to use buffered I/O.
Note: In general, if you are using direct I/O, make the data
file cache as large as system resources allow.If you are using
buffered I/O, the data file cache is not used.
Related
Products
Enterprise Performance Management and Business Intelligence >
Enterprise Performance Management > Essbase > Hyperion
Essbase > Data Administration > Data Administration
Keywords
BLOCK SIZE; CACHE; DATA; DEFAULT VALUES; DYNAMIC ADV BEST
PRACTICES; DYNAMIC ADV USE; ESSBASE; SIZING; THREADS
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