Caché Installation Guide - InterSystems Documentation

Calculating System Parameters for UNIX and Linux
B.2.2.5 Sun Solaris Platform Notes
The Solaris 10 release no longer uses the /etc/system mechanism to tune the IPC shared
memory parameters. These allocations are now automatic or configured through the resource
controls mechanism.
If you try to use /etc/system on Solaris 10, you may receive the following message:
* IPC Shared Memory
*
* The IPC Shared Memory module no longer has system-wide limits.
* Please see the "Solaris Tunable Parameters Reference Manual" for
* information on how the old limits map to resource controls and
* the prctl(1) and getrctl(2) manual pages for information on
* observing the new limits.
See “Chapter 6 Resource Controls (Overview)” of the System Administration Guide: Solaris
Containers-Resource Management and Solaris Zones on the Sun Web site for detailed
information on using the rctladm, prctl, and projects commands to set Solaris 10 parameters.
See the Solaris Tunable Parameters Reference Manual for specific information on Solaris
tunable parameters.
B.2.2.6 SUSE Linux Platform Notes
The default shared memory limits (shhmax and shmall) on SUSE Linux platforms are too
small for Caché, and can be changed in the proc file system without a restart.
If the machine is being used only for Caché, InterSystems recommends setting the shared
memory to approximately half the total memory.
For example, to allow 512 MB, type the following commands:
#sets shmall and shmmax shared memory
echo 536870912 >/proc/sys/kernel/shmall
echo 536870912 >/proc/sys/kernel/shmmax
#Sets shmall to 512 MB
#Sets shmmax to 512 MB
You can also put these commands into a script run at startup.
Also change the settings for the system memory user limits by modifying a file called
/etc/profile. Add lines similar to the following:
#sets user limits (ulimit) for system memory resources
ulimit -v 512000 #set virtual (swap) memory to 512 MB
ulimit -m 512000 #set physical memory to 512 MB
In this same file, you can permanently change the values for the PATH and CLASSPATH
parameters by adding lines similar to the following:
84 Caché Installation Guide