swapon(8) System Manager's Manual swapon(8)Name
swapon - specify additional device for paging and swapping
Syntax
/etc/swapon -a
/etc/swapon name ...
Description
The command 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 normally occur in the system multi-user initializa-
tion file making all swap devices available, so that the paging and swapping activity is interleaved across several devices.
Normally, the option is given, causing all devices marked as ``sw'' (swap devices) in to be made available.
The second form gives individual block devices, as listed in the system swap configuration table. The call makes only this space available
to the system for swap allocation.
Restrictions
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.
Files
Normal paging devices
See Alsoswapon(2), init(8)swapon(8)
Check Out this Related Man Page
swapon(2) System Calls Manual swapon(2)Name
swapon - add a swap device for interleaved paging/swapping
Syntax
swapon(special)
char *special;
Description
The system call makes the block device special available to the system for allocation for paging and swapping. The names of potentially
available devices are known to the system and defined at system configuration time. The size of the swap area on special is calculated at
the time the device is first made available for swapping.
Restrictions
There is no way to stop swapping on a disk so that the pack may be dismounted.
Diagnostics
The system call succeeds unless:
[ENOTDIR] A component of the path prefix is not a directory.
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire pathname exceeded 1023 characters.
[ENOENT] The named device does not exist.
[EACCES] Search permission is denied for a component of the path prefix.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[EPERM] The caller is not the super-user.
[ENOTBLK] The special is not a block device.
[EBUSY] The device specified by special has already been made available for swapping.
[EINVAL] The device configured by special was not configured into the system as a swap device.
[ENXIO] The major device number of special is out of range. (This indicates that no device driver exists for the associated hard-
ware.)
[EIO] An I/O error occurred while opening the swap device.
[EFAULT] The special points outside the process's allocated address space.
See Alsoconfig(8), swapon(8)swapon(2)
Hi,
Trying to add a swap file to my server as below:
dd if=/dev/zero of=/swapfile1 bs=1M count=2048
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 27.4514 seconds, 78.2 MB/s
# mkswap -c /swapfile1
Setting up swapspace version 1, size = 2147479 kB
# swapon... (6 Replies)
Is there a trick to mounting swap in n a lvm? I can't get it to work.
# swapon -va
swapon on /dev/mapper/VG-lv_swap
swapon: /dev/mapper/VG-lv_swap: found swap signature: version 1, page-size 4, same byte order
swapon: /dev/mapper/VG-lv_swap: pagesize=4096, swapsize=4294967296,... (1 Reply)
hello all
i have application which according to AWS monitoring is reaching to high spikes of IO at random time .
and causing the server to crash and restart .
my question is how can i find out what cause the spike and if i can't with the native linux tools
what free open source minimon... (6 Replies)