Release Notes

|4.21 Solaris Kernel Configuration Parameters (Recommended Values)

|The Before You Begin section in the Solaris chapter of the DB2 for |UNIX Quick Beginnings and DB2 Enterprise - Extended Edition Quick |Beginnings for UNIX provides recommended Solaris kernel configuration |parameters. The following table provides additional kernel |configuration-parameter recommendations for systems with more than 512 MB of |real memory.
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|Table 1. Solaris Kernel Configuration Parameters (Recommended Values)

Kernel Parameter 512 MB-1 GB 1 GB-4 GB 4 GB+
msgsys:msginfo_msgmax 65,535 65,535 65,535
msgsys:msginfo_msgmnb 65,535 65,535 65,535
msgsys:msginfo_msgmap 514 1,026 2,050
msgsys:msginfo_msgmni 512 1,024 2,048
msgsys:msginfo_msgssz 16 32 64
msgsys:msginfo_msgtql 1,024 2,048 4,096
msgsys:msginfo_msgseg 32,767 32,767 32,767
shmsys:shminfo_shmmax 483,183,820 - 966,676,1

966,367,641 - 3,865,470,566

3,865,470,566 - 4,294,967,296
shmsys:shminfo_shmseg 50 100 200
shmsys:shminfo_shmmni 300 1,024 2,048
semsys:seminfo_semmni 1,024 2,048 4,198
semsys:seminfo_semmap 1,026 2,050 4,096
semsys:seminfo_semmns 2,048 4,096 8,192
semsys:seminfo_semmnu 2,048 4,096 8,192
semsys:seminfo_semume 50 50 50

|Notes:

  1. |The limit of the shmsys:shminfo_shmmax parameter is 4 GB for |32-bit systems.

  2. |The msgsys:msginfo_msgmnb and msgsys:msginfo_msgmax parameters |must be set to 65,535 or larger.

  3. |The msgsys:msginfo_msgseg parameter must be set no higher than |32,767.

  4. |The shmsys:shminfo_shmmax parameters should be set to the suggested |value in the above table or to 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 184,968,806 |(196*1024*1024*0.9). |

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