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Operating Systems Solaris Solaris 10 swap device and filesystem Post 302977664 by jlliagre on Thursday 21st of July 2016 04:50:34 AM
Old 07-21-2016
Quote:
Originally Posted by javanoob
Due to personal preference, I do not want to create a swapfile and add on to the existing swap space.
Given the fact using a swapfile would be the most sensible solution, can you elaborate on this personal preference against it?

How much free space is available on the 100GB partition and on the root (/) one?

Will the application make actually use of the swap, i.e. is there a risk the application do more than reserving that extra memory and effectively write pages there?

If you are sure the answer is no for the last question, you might fake swap space by using a sparse file:

e.g.:
Code:
mkfile -n 64g /var/tmp/64g-sparse
swap -a `lofiadm -a /var/tmp/64g-sparse`

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mkfile(1M)																mkfile(1M)

NAME
mkfile - create a file SYNOPSIS
mkfile [-nv] size [g | k | b | m] filename... mkfile creates one or more files that are suitable for use as NFS-mounted swap areas, or as local swap areas. When a root user executes mkfile(), the sticky bit is set and the file is padded with zeros by default. When non-root users execute mkfile(), they must manually set the sticky bit using chmod(1). The default size is in bytes, but it can be flagged as gigabytes, kilobytes, blocks, or megabytes, with the g, k, b, or m suffixes, respectively. -n Create an empty filename. The size is noted, but disk blocks are not allocated until data is written to them. Files created with this option cannot be swapped over local UFS mounts. -v Verbose. Report the names and sizes of created files. USAGE
See largefile(5) for the description of the behavior of mkfile when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes). See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ chmod(1), swap(1M), attributes(5), largefile(5) 2 Feb 2001 mkfile(1M)
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