A Practical Hardware Sizing Guide for Sybase IQ

CPUs
CPUs for queries 0.1-1.5 CPUs per query
CPUs for loads 0.05-0.5 CPUs per index and column,
though the HG, WD, and TEXT indexes
are fully parallel and can consume all
CPUs on a system
Memory
Total IQ memory for all operations Total RAM less 10-20% for the OS
Main and temporary cache during
queries
Final
40% main cache, 60% temporary cache
of remaining RAM
Main cache during loads 5-10 pages per index and column
Temporary cache during loads Each HG: (8 + sizeof( datatype )) *
numberRowsBeingLoaded
Each WD: (8 + sizeof( datatype )) *
numberRowsBeingLoaded * numberTokens
(rounded to next highest page boundary)
Load Memory binaryTableWidth * 10,000 * 45 / 1024 /
1024
Bitmap memory during loads 8,192 bytes per distinct value loaded into
each LF, HNG, DTTM, DATE, TIME, and
CMP index
Backup memory TmpVal = max(2 * numberOfCpus,
8 * numberOfMainLocalSpaces )
Memory = (TmpVal * 20 ) * ( block factor *
block_size )
Catalog Cache (-c or -cl/-ch) 2-16x the size of the catalog (.db) file
Storage and I/O
Required I/O bandwidth per CPU core 20-40 MB/sec
Total bandwidth per server #cores * 20-30 MB/s
Minimum number of physical fiber 0.3-1 drives per core
channel disk drives per CPU core Calculate separately for main and for temp
Minimum number of physical SAS disk 0.5-3 drives per core
drives per CPU core
Calculate separately for main and for temp
Minimum number of physical SATA 2-5 drives per core
disk drives per CPU core
Calculate separately for main and for temp
Maximum number of CPU cores per 4-8 cores per fiber controller
fiber controller for main
Calculate separately for main and for temp
Number of IQ main/local store LUNs 3 + ( #cores / 10 ) ( rounded up)
Number of IQ temporary store LUNS 3 + ( #cores / 10 ) ( rounded up)
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