Table 20-2 shows the formulas for determining the values of environment variables related to the number of resources. If the obtained value is greater than the default value for the corresponding environment variable, set the obtained value in the environment variable. Otherwise, a problem may result; for example, HiRDB might be unable to start or a utility might be unable to execute.

These formulas provide the values required for a server machine.

Table 20-2 Values of environment variables related to the number of resources (HiRDB/Parallel Server)

Type	Formula	Corresponding environment variable	Default
Number of message queue identifiers	b Vi + 2a + 3b +c + d + e + 24 i=1	PDUXPLMSGMNI	50
Number of message queue tables	MAX(h number of message queue identifiers, total value of pdbuffer with -m specified)	PDUXPLMSGTQL	80
Number of semaphore identifiers	When the standby-less system switchover (effects distributed) facility is not used b {(Si + Ti + Ui) 64 + Wi} i = 1 + 6 b + 2 + f When the standby-less system switchover (effects distributed) facility is used b {{Yi (j + k)} 64 + Wi} i = 1 + 6 b + 2 + f	PDUXPLSEMMAX	64
Shared memory usage count	2 g + 16 b	PDUXPLSHMMAX	4096

a: Number of front-end servers in the server machine

b: Number of dictionary servers and back-end servers in the server machine

c: 2 for the front-end server; 0 for other

d: 5 for the dictionary server; 0 for other

e: 5 for the back-end server; 0 for other

f: Add when the system switchover facility is being used. Determine the value from the following table:

Condition			Value of f
pd_ha_acttype=monitor (or default)			0
pd_ha_acttype=server	pd_ha_agent=standbyunit		1
	pd_ha_agent omitted	pd_ha_server_process_standby=Y (or default)	1
		pd_ha_server_process_standby=N	0

g: Value of the pd_max_server_process operand

h: Value of the pd_max_users operand

j: Number of host BESs

k: Number of guest BESs

S_i: Number of pdbuffer -r operands defined for the RDAREAs in each server

T_i: Number of pdbuffer -i operands defined for the RDAREAs in each server

U_i: Number of pdbuffer -o operands defined

Vi: 1 (if 1 or greater is specified in the pd_max_ard_process operand) or 0

Wi: 2 (if a value is specified in the pd_dfw_awt_process operand) or 0

Yi: Number of -c options specified in the pdbuffer operand