Installation and Configuration Supplement

Step 2. Update the Kernel Configuration Parameters

To run DB2 for HP-UX, you may have to update some kernel configuration parameters; the following values are recommended:

Table 30. HP-UX Kernel Configuration Parameters (Recommended Values)

Kernel Parameter Physical Memory
64MB - 128MB 128MB - 256MB 256MB+

maxuprc maxfiles nproc nflocks ninode nfile msgseg msgmnb msgmax msgtql msgmap msgmni msgssz semmni semmap semmns semmnu shmmax shmseg shmmni

256 256 512 2048 512 (4 * ninode) 8192 65 535 (1) 65 535 (1) 256 130 128 16 128 130 256 256 67 108 864 16 300

384 256 768 4096 1024 (4 * ninode) 16 384 65 535 (1) 65 535 (1) 512 258 256 16 256 258 512 512 134 217 728 (2) 16 300

512 256 1024 8192 2048 (4 * ninode) 32 768 65 535 (1) 65 535 (1) 1024 258 256 16 512 514 1024 1024 268 435 456 (2) 16 300

Kernel Parameter	Physical Memory
64MB - 128MB	128MB - 256MB	256MB+
maxuprc maxfiles nproc nflocks ninode nfile msgseg msgmnb msgmax msgtql msgmap msgmni msgssz semmni semmap semmns semmnu shmmax shmseg shmmni	256 256 512 2048 512 (4 * ninode) 8192 65 535 (1) 65 535 (1) 256 130 128 16 128 130 256 256 67 108 864 16 300	384 256 768 4096 1024 (4 * ninode) 16 384 65 535 (1) 65 535 (1) 512 258 256 16 256 258 512 512 134 217 728 (2) 16 300	512 256 1024 8192 2048 (4 * ninode) 32 768 65 535 (1) 65 535 (1) 1024 258 256 16 512 514 1024 1024 268 435 456 (2) 16 300

Notes:

Parameters msgmnb and msgmax must be set to at least 65535.
Parameter shmmax should be set to 134217728 or 90% of the physical memory (in bytes), whichever is higher. For example, if you have 196 MB of physical memory in your system, set shmmax to 184 968 806 (196*0.9*1024*1024).
To maintain the interdependency among kernel parameters, change parameters in the same sequence in which they appear in the preceding table.

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