Installation and Configuration Supplement

Step 2. Update the Kernel Configuration Parameters

To run DB2 for Solaris, you may have to update some kernel configuration parameters. The following minimum values are recommended:

Table 31. Solaris Kernel Configuration Parameters (Recommended Values)

Kernel Parameter	Physical Memory
	64MB - 128MB	128MB - 256MB	256MB - 512MB	512MB+
msgsys:msginfo_msgmax msgsys:msginfo_msgmnb msgsys:msginfo_msgmap msgsys:msginfo_msgmni msgsys:msginfo_msgssz msgsys:msginfo_msgtql msgsys:msginfo_msgseg shmsys:shminfo_shmmax shmsys:shminfo_shmseg shmsys:shminfo_shmmni semsys:seminfo_semmni semsys:seminfo_semmap semsys:seminfo_semmns semsys:seminfo_semmnu	65 535(1) 65 535(1) 130 128 16 256 8 192 67 108 864 16 300 128 130 256 256	65535(1) 65 535(1) 258 256 16 512 16 384 134 217 728(2) 16 300 256 258 512 512	65 535(1) 65 535(1) 258 256 16 1024 32 768 268 435 456(2) 16 300 512 514 1024 1024	65 535(1) 65 535(1) 258 256 16 1024 32 768 536 870 912(2) 16 300 1024 1026 2048 2048

Notes:

1. The msgsys:msginfo_msgmnb and msgsys:msginfo_msgmax parameters must be set to 65535 or larger.

2. The shmsys:shminfo_shmmax parameters should be set to the suggested value in the above table, 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 the shmsys:shminfo_shmmax parameter to 184968806 (196*0.9*1024*1024).

To set a kernel parameter, add a line at the end of the /etc/system file as follows:

   set parameter_name = value

For example, to set the value of the msgsys:msginfo_msgmax parameter, add the following line to the end of the /etc/system file:

   set msgsys:msginfo_msgmax = 65535

Sample files for updating the kernel configuration parameters are provided in the /opt/IBMdb2/V6.1/cfg directory. The names for these files are as follows:

kernel.param.64MB

for systems with 64MB-124MB of physical memory

kernel.param.128MB

for systems with 128MB-256MB of physical memory

kernel.param.256MB

for systems with 256MB-512MB of physical memory

kernel.param.512MB

for systems with 512MB-1GB of physical memory

Depending upon the amount of physical memory in your system, append the appropriate kernel configuration parameter file to the /etc/system file. If necessary, change the value of the shmsys:shminfo_shmmax parameter as described in Note 2 above.

After updating the /etc/system file, reboot the system.

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