12-16-2008
SAP swap recommendations
Hello all.
My company is installing an SAP ERP financials. The consultants are asking me to allocate 30Gbytes of swap. This is on a dedicated Linux box running Redhat 5 64Bit OS. It has 16GB of RAM.I have asked for an explanation but all I'm getting is that this is what SAP recommends. It seems really strange. Redhat recommends 1/3 times RAM for swap on RHEL5. I am seeing virtually no swapping going on. It seems to me if they need this much swap I should be adding RAM. My experience from way back it that too much swap on a linux box can cause problems. This was back in 2002 or so but I'm sure we were seeing really bad performance with too much swap that went away once we reduced it to 2GB of swap only.
My question is simple. Anyone out there running SAP with less swap than RAM? If so, are you experiencing and real problems?
Thanks.
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LEARN ABOUT SUSE
glib::flags
Glib::Flags(3) User Contributed Perl Documentation Glib::Flags(3)
NAME
Glib::Flags
DESCRIPTION
Glib maps flag and enum values to the nicknames strings provided by the underlying C libraries. Representing flags this way in Perl is an
interesting problem, which Glib solves by using some cool overloaded operators.
The functions described here actually do the work of those overloaded operators. See the description of the flags operators in the "This
Is Now That" section of Glib for more info.
HIERARCHY
Glib::Flags
METHODS
scalar = $class->new ($a)
o $a (scalar)
Create a new flags object with given bits. This is for use from a subclass, it's not possible to create a "Glib::Flags" object as such.
For example,
my $f1 = Glib::ParamFlags->new ('readable');
my $f2 = Glib::ParamFlags->new (['readable','writable']);
An object like this can then be used with the overloaded operators.
scalar = $a->all ($b, $swap)
o $b (scalar)
o $swap (scalar)
ref = $a->as_arrayref
integer = $a->bool ($b, $swap)
o $b (scalar)
o $swap (integer)
integer = $a->eq ($b, $swap)
o $b (scalar)
o $swap (integer)
integer = $a->ge ($b, $swap)
o $b (scalar)
o $swap (integer)
scalar = $a->intersect ($b, $swap)
o $b (scalar)
o $swap (scalar)
integer = $a->ne ($b, $swap)
o $b (scalar)
o $swap (integer)
scalar = $a->sub ($b, $swap)
o $b (scalar)
o $swap (scalar)
scalar = $a->union ($b, $swap)
o $b (scalar)
o $swap (scalar)
scalar = $a->xor ($b, $swap)
o $b (scalar)
o $swap (scalar)
SEE ALSO
Glib
COPYRIGHT
Copyright (C) 2003-2009 by the gtk2-perl team.
This software is licensed under the LGPL. See Glib for a full notice.
perl v5.12.1 2010-07-05 Glib::Flags(3)