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Operating Systems Solaris How do I add extra ZFS swap in Solaris 11.3? Post 303028603 by gull04 on Friday 11th of January 2019 03:04:22 AM
Old 01-11-2019
Hi Feroccimx,

I would say that if you have a system with 2Tb of memory and have experienced performance issues, it is much more likely to be an application or configuration issue. A 3Tb swap area is inordinately large and as ZFS will use large portions of local memory for paging and swapping, moving significant ammounts of that to disk will impact performance of the SAN in a significant way.

I think that there is a need for some serious analysis work.

Regards

Gull04
 

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SWAPON(8)						      System Manager's Manual							 SWAPON(8)

NAME
swapon - specify additional device for paging and swapping SYNOPSIS
swapon -a swapon name ... DESCRIPTION
Swapon is used to specify additional devices on which paging and swapping are to take place. The system begins by swapping and paging on only a single device so that only one disk is required at bootstrap time. Calls to swapon normally occur in the system multi-user initial- ization file /etc/rc making all swap devices available, so that the paging and swapping activity is interleaved across several devices. Normally, the -a argument is given, causing all devices marked as ``sw'' swap devices in /etc/fstab to be made available. The second form gives individual block devices as given in the system swap configuration table. The call makes only this space available to the system for swap allocation. SEE ALSO
swapon(2), init(8) FILES
/dev/[ru][pk]?b normal paging devices BUGS
There is no way to stop paging and swapping on a device. It is therefore not possible to make use of devices which may be dismounted dur- ing system operation. swapon is not implemented in 2.11BSD. 4th Berkeley Distribution November 17, 1996 SWAPON(8)
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