Quick Beginnings

Step 2. Updating HP-UX Kernel Configuration Parameters

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

Table 43. 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 65535 (1) 65535 (1) 128 130 128 16 128 130 256 256 67108864 16 300	384 256 768 4096 1024 (4 * ninode) 16384 65535 (1) 65535 (1) 256 258 256 16 256 258 512 512 134217728 (2) 16 300	512 256 1024 8192 2048 (4 * ninode) 32768 65535 (1) 65535 (1) 256 258 256 16 512 514 1024 1024 268435456 (2) 16 300

Notes:

1. Parameters msgmnb and msgmax must be set to 65535.

2. To maintain the interdependency among kernel parameters, change parameters in the same sequence in which they appear in the preceding table.

3. 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 184968806 (176*1024*1024).

To change the values, do the following:

1. Use SAM and select Kernel Configuration.

2. Select Configurable Parameters.

3. Highlight the parameter to be changed.

4. Select Modify Configurable Parameter from the Actions menu and make the appropriate changes.

5. Repeat the previous two steps for every kernel parameter which needs to be updated.

6. Create a new kernel by selecting Create a New Kernel from the Actions menu.

7. Reboot the system so that the changes can take effect.

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