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Fixed markup bugs.

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Ruslan Ermilov 2009-09-29 10:50:02 +00:00
parent ef0097a6aa
commit dedfd26648
1 changed files with 12 additions and 7 deletions
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19
share/man/man7/tuning.7
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@ -407,22 +407,27 @@ The
.Va vm.overcommit
sysctl defines the overcommit behaviour of the vm subsystem.
The virtual memory system always does accounting of the swap space
reservation, both total for system and per-user. Corresponding values
reservation, both total for system and per-user.
Corresponding values
are available through sysctl
.Va vm.swap_total,
.Va vm.swap_total ,
that gives the total bytes available for swapping, and
.Va vm.swap_reserved,
.Va vm.swap_reserved ,
that gives number of bytes that may be needed to back all currently
allocated anonymous memory.
.Pp
Setting bit 0 of the
.Va vm.overcommit
sysctl causes the virtual memory system to return failure
to the process when allocation of memory causes vm.swap_reserved
to exceed vm.swap_total.
Bit 1 of the sysctl enforces RLIMIT_SWAP limit
to the process when allocation of memory causes
.Va vm.swap_reserved
to exceed
.Va vm.swap_total .
Bit 1 of the sysctl enforces
.Dv RLIMIT_SWAP
limit
(see
.Xr getrlimit 2 ).
.Xr getrlimit 2 ) .
Root is exempt from this limit.
Bit 2 allows to count most of the physical
memory as allocatable, except wired and free reserved pages