DB2 Connect Quick Beginnings for UNIX**

Updating NUMA-Q/PTX Kernel Configuration Parameters

Before installing DB2 Connect for NUMA-Q product using the db2setup utility, you may need to update your system's kernel configuration parameters. The values in Table 7 are the recommended PTX kernel configuration parameters.
Note:You must reboot your machine after updating any kernel configuration parameters.

Table 7. PTX Kernel Configuration Parameters (Recommended Values)
Kernel Parameter Physical Memory
512MB+ 
msgmap
msgmax(1)
msgmnb(1)
msgmni
msgssz
msgtql
msgseg(2)
semmni
semmap
semmnu
semmns
semume
shmmax(3)
shmseg
shmmni
shm_lock_ok
shm_lock_uid


514
65535
65535
512
64
1024
32767
1024
514
2048
2048
80
2147483647
16
300
1
-1

Notes:

  1. The msgmax and msgmnb must be set to 65535 or larger.

  2. The msgsem parameter must be set no higher than 32767.

  3. The shmmax must be set to 2147483647 or larger.

To modify your PTX kernel configuration parameters, perform the following steps:

Step  1.

Log on as a user with root authority.

Step  2.

Enter the menu command.

Step  3.

Press A to select the System Administration option.

Step  4.

Press C to select the Kernel Configuration option.

Step  5.

Press Ctrl+F in the Change Kernel Configuration Disk form. If you want to build the new kernel in a disk other than the root disk, enter the disk and press Ctrl+F.

Step  6.

In the Compile, Configure, or Remove a Kernel window, select the kernel configuration type with which your current kernel is built and press K.

Step  7.

In the Configure a kernel with site specific parameters form, go down one page (press Ctrl+D), press A for All in the Visibility level for parameter changes and then press Ctrl+F.

Step  8.

In the Configure Files With Adjustable Parameters window select ALL (press Ctrl+T) and press Ctrl+F.

Step  9.

In the Tunable Parameters window, use arrow keys to navigate. Press Ctrl+T to select the parameter you want to change and press Ctrl+F.

Step 10.

In the Detail of Parameter Expression(s) window, press s to set the new value.

Step 11.

In the Add site specific 'set' parameter form, enter the new value and press Ctrl+F.

Step 12.

Repeat steps 9 through 11 to change the values of all other parameters that you want to change.

Step 13.

Once you are done changing all the parameters, press Ctrl+E from the Tunable Parameters window.

Step 14.

Compile the kernel.

Step 15.

Press Ctrl+X to exit the menu.

Step 16.

Reboot the system so that the changes can take effect.

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