memory_pressure(1) [mojave man page]

MEMORY_PRESSURE(1)					    BSD General Commands Manual 					MEMORY_PRESSURE(1)

NAME

     memory_pressure -- Tool to apply real or simulate memory pressure on the system.

SYNOPSIS

     memory_pressure [-l level] | [-p percent_free] | [-S -l level]

OPTIONS

     -l <level> Apply real or simulate memory pressure (if specified alongside simulate argument) on the system till low memory notifications cor-
     responding to <level> are generated. Supported values are "warn" and "critical".

     -p <percent_free> Allocate memory till the available memory in the system is <percent_free> of total memory. If the percentage of available
     memory to total memory on the system drops, the tool will free memory till either the desired percentage is achieved or it runs out of memory
     to free.

     -S Simulate memory pressure on the system by placing it artificially for <sleep_seconds> duration at the "warn" or "critical" level.

     -s <sleep_seconds> Duration to wait before allocating or freeing memory if applying real pressure. In case of simulating memory pressure,
     this is the duration the system will be maintained at an artifical memory level.

DESCRIPTION

     A tool to apply real or simulate memory pressure on the system

SEE ALSO

     vm_stat(1)

Mac OS X							    Mar 7, 2013 							  Mac OS X

ddi-forceattach(9P)					   Kernel Properties for Drivers				       ddi-forceattach(9P)

NAME

       ddi-forceattach, ddi-no-autodetach - properties controlling driver attach/detach behavior

DESCRIPTION

       Solaris	device	drivers are attached by devfsadm(1M) and by the kernel in response to open(2) requests from applications. Drivers not cur-
       rently in use can be detached when the system experiences memory pressure. The ddi-forceattach and ddi-no-autodetach properties can be used
       to customize driver attach/detach behavior.

       The ddi-forceattach is an integer property, to be set globally by means of the driver.conf(4) file. Drivers with this property set to 1 are
       loaded and attached to all possible instances during system startup. The driver will not be auto-detached due to system memory pressure.

       The ddi-no-autodetach is an integer property to be set globally by means of the driver.conf(4) file or created dynamically by the driver on
       a  per-instance	basis  with  ddi_prop_update_int(9F). When this property is set to 1, the kernel will not auto-detach driver due to system
       memory pressure.

       Note that ddi-forceattach implies ddi-no-autodetach. Setting either property to a non-integer value or an integer value not equal to 1 pro-
       duces  undefined  results. These properties do not prevent driver detaching in response to reconfiguration requests, such as executing com-
       mands cfgadm(1M), modunload(1M), rem_drv(1M), and update_drv(1M).

SEE ALSO

       driver.conf(4)

       Writing Device Drivers

SunOS 5.10							    18 May 2001 					       ddi-forceattach(9P)