Use the following formulas to calculate the memory required by in-memory data processing.

For HiRDB/Parallel Server, calculate the RDAREA used as in-memory separately for each server machine.

Formula

When shared memory used by the in-memory data buffer is not locked in real memory Formula 1 + D x 2 (KB) When shared memory used by the in-memory data buffer is locked in real memory Formula 1 + D x (2,048 p x p) 1,024 (KB)

Formula 1

When shared memory used by the in-memory data buffer is not locked in real memory n {736 + 32 x A + 48 + 448 x B + 2,048 + C x B} 1,024 (KB) i=1 When shared memory used by in-memory data buffer is locked in real memory n {(736 + 32 x A + 48 + 448 x B + 2,048 + C x B) p x p} 1,024 (KB) i=1

n: Number of in-memory RDAREAs

A: Number of HiRDB files that constitute an in-memory RDAREAs

B: Total number of pages of in-memory RDAREAs

C: Page size of in-memory RDAREAs

D: Value of Formula 2

p: Page size in a Windows Large Page

Can be checked with the pdntenv command.

Formula 2 (number of shared memory segments used by in-memory data buffer)

value of Formula 1 (value of SHMMAX operand x 1,024)

The value found by Formula 2 is used to calculate the pd_max_resident_rdarea_shm_no operand.