Sybase 15.0.2 manual Pre-installation tasks for Adaptive Server

Pre-installation tasks for Adaptive Server

Adaptive Server may allocate shared memory segments after start-up if any reconfiguration through sp_configure requires additional memory. You may need to account for these additional segments. Allocate the maximum memory you will make available to Adaptive Server, by using the allocate max shared memory configuration parameter. See the System Administration Guide for more information.

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17To optimize asynchronous I/O and to prevent the paging of shared memory, you must grant MLOCK permissions before you install Adaptive Server.

To grant MLOCK permissions to a group, enter:

/etc/privgrp add mlock <group name>

or:

/etc/setprivgrp <group name> MLOCK

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If after adjusting the SHMMAX parameter the server fails to reboot you may also need to increase the value of another Kernel parameter, SHMALL, which is the maximum amount of shared memory that can be allocated. Its value is in the file /proc/sys/kernel/shmall. This task requires root permission.

26 Adaptive Server Enterprise