Sybase 12.4.2 Physical size of memory on the system, Options that can provide more memory, 435

	CHAPTER 12 Managing System Resources
	Table 12-4: Total available memory by platform
	Platform		Total memory available
	CompaqTru64 (Digital UNIX)		Effectively unlimited
	HP UNIX		3GBa
	IBM RS6000 AIX		2GBa
	SGI IRIX		Effectively unlimited
	Sun Solaris 32-bit		3.3GB
	Sun Solaris 64-bit		Effectively unlimited
	Windows NTb		2.5GB
	aYou must specify the -iqsmemoption to	get this much memory on HP UNIX and
	AIX.
	bYou need Windows NT Enterprise to get this much memory.
	On 64-bit platforms (Tru64, SGI IRIX, and Solaris 64-bit), the only limit is the
	physical size of memory on the system.
	For Windows NT systems, see the Adaptive Server IQ Installation and
	Configuration Guide for more performance tuning hints, including
	recommendations for small memory configurations.
	For UNIX systems only, Adaptive Server IQ provides two command-line
	options that can provide more memory.
Wired memory pool	On Digital UNIX, HP and Sun platforms, you can designate a specified amount
	of memory as “wired” memory. This memory is locked down so that it cannot
	be paged. Wired memory can improve performance. To create a pool of
	“wired” memory on these UNIX platforms only, specify the -iqwmem

command-line switch, indicating the number of MB of wired memory. The maximum value for -iqwmemvaries by platform:

• 3800 on Sun

• 2000 on HP UNIX

• no real maximum for DEC

For example, to add 1GB of wired memory, you specify: -iqwmem 1000

Warning! Use this switch only if you have enough memory to dedicate some of it for this purpose. Otherwise, you can cause serious performance degradation.

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