IBM G210-1784-00 Manuale Utente

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set msgsys:msginfo_msgmap=0x102 
set msgsys:msginfo_msgmni=0xFF 
set msgsys:msginfo_msgssz=0x10 
set msgsys:msginfo_msgtql=0x400 
 
set shmsys:shminfo_shmmax=0x20000000 
set shmsys:shminfo_shmseg=0x32 
set shmsys:shminfo_shmmni=0x12C 
 
set semsys:seminfo_semmni=0x400 
set semsys:seminfo_semmap=0x400 
set semsys:seminfo_semmns=0x800 
set semsys:seminfo_semmnu=0x800 
set semsys:seminfo_semume=0x32 
 
The settings can be verified with these commands: 
 
# ipcs –a 
# sysdef | egrep MSG\|SEM\|SHM 
 
This information is also available in the DB2 knowledge base at: 
•  LINUX USERS: Running DB2 on a Linux 2.4 server requires changes to the Linux kernel parameters. 
Recompile the kernel source as explained below before you install DB2 on the server. 
•  Change the msgmni parameter to 256 with the following command:  
 echo 256 > /proc/sys/kernel/msgmni 
This resets the maximum number of SYSV IPC message queues from the default of 16 to 256. 
•  Increase SEMMNI from 128 to 2048.  
This specifies the maximum number of semaphore IDs allowed in the kernel; the upper limit for this 
value is 32768. 
•  Increase SEMMSL from 250 to 500.  
This specifies the maximum number of semaphores per sem ID; the upper limit for this value is 8000. 
•  Increase SEMOPM from 32 to 256.  
This specifies the maximum number of operations allowed per semop() call; the upper limit for this value 
is 1000. 
•  Increase the number of open files using the command:  
echo 32768 > /proc/sys/fs/file-max  
Chapter 9: Installing and Configuring Database Servers and Schema 39