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Caché Installation Guide - InterSystems Documentation

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<strong>Caché</strong> UNIX-based <strong>Installation</strong><br />

5.3.1 Adjust Macintosh Kernel Parameters<br />

When using the UNIX-type installation, it may be necessary to adjust the shared memory<br />

kernel parameters of the operating system before installing <strong>Caché</strong> to avoid a shared memory<br />

problem illustrated by the following example:<br />

Configuring minimum system...<br />

Unable to allocate 1 MB global buffer space...<br />

Unable to allocate shared memory<br />

Cache: Invalid argument<br />

Cache failed to start.<br />

Check if shared memory requirements exceed system resources.<br />

Call <strong>InterSystems</strong> Technical Support if you need assistance.<br />

** <strong>Installation</strong> aborted **<br />

Verify that the shared memory meet the minimum requirements. If it is necessary, increase<br />

the shared memory on the Mac OS X system in the /etc/sysctl.conf file to at least the following<br />

values:<br />

kern.sysv.shmmax: 67108864<br />

kern.sysv.shmall: 16384<br />

kern.sysv.shmmin: 1<br />

kern.sysv.shmseg: 4<br />

kern.sysv.shmmni: 32<br />

Important:<br />

Do not make these updates to the kernel parameters in the /etc/rc file; an<br />

operating system maintenance release could replace them.<br />

<strong>Caché</strong> <strong>Installation</strong> <strong>Guide</strong> 49

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