In our production box i can see the Swap space using the below command
I heard in forums SWAP space should be double the size of RAM or atleast half of it.
Also with TOP command and sorted on Swap i got the below output
The first two entries itself will add up above 6GB
How come one command shows the SWAP as less than 4GB and the top command show as used more than 6GB.
We had few performance issue in the prod box. trying to analyse some good practice on memory setup
I need to put a program together to determine the total, available memory and total and available swap on unix machines. I have been searching for weeks and I seem to run into dead ends. Every unix platform I look at has a different way to determine memory info.
Any sugggestions or new... (4 Replies)
Hi
Can any help me on setting the swap memory ? I would like to set swap memory for installing oracle 9i software.
RAM - 512 Mb
HDD - 40 Gb
OS - Sun Solaris 5.9 (6 Replies)
Hi,
When I execute one of my shellscript I am getting the below mentioned error message .This application takes 2input files which have the records counts 26463 and 1178046
exec(2): insufficient swap or memory available.
exec(2): insufficient swap or memory available.
exec(2):... (2 Replies)
Hi,
When I execute one of my shellscript I am getting the below mentioned error message .This application takes 2input files which have the records counts 26463 and 1178046
exec(2): insufficient swap or memory available.
exec(2): insufficient swap or memory available.
exec(2): insufficient swap... (3 Replies)
Hi,
I want to see used swap memory
I know that for this there is command free -m
but this shows Swap: 16383 4529 11854
by top command
while load is 1.05
max CPU % 24 mysqld
why used swap shows 4529
either it is not flushed
there is other command... (2 Replies)
:wall:I'm having a bit of a problem with Solaris 10u8 and one of our applications requesting memory and being told, "no space left".
The break down:
24GB Physical Memory
8GB swap
at the time of occurance, here's what a memory breakdown looks like:
Page Summary Pages ... (21 Replies)
hi guys
the monitoring team is using a tool for monitoring linux boxes and they set an alarm for swap memory to 10%(critical) I really has no idea when swap memory usage is high....
Can someone recommend me a threshold for this? when is warning or critical and this parameters can affect... (3 Replies)
here is the output of swapinfo command
==> swapinfo
Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 8192000 0 8184000 0% 0 - 1 /dev/vg00/swap
reserve - 8184000 -8184000
memory ... (5 Replies)
Hi team,
Is there any ability to force the system to use the swap memory for a specific service? And prevent another service of using the swap memory?
Thanks (2 Replies)
Admins,
How can I configure the server so that it will utilize the swap file as little as possible? Please correct me if I'm wrong, I would say change the value of sysctl - vm.swappiness? And if, how can I keep it permenatly even after rebooting the system? since no related parameters in... (7 Replies)
Discussion started by: leo_ultra_leo
7 Replies
LEARN ABOUT CENTOS
systemd.swap
SYSTEMD.SWAP(5) systemd.swap SYSTEMD.SWAP(5)NAME
systemd.swap - Swap unit configuration
SYNOPSIS
swap.swap
DESCRIPTION
A unit configuration file whose name ends in ".swap" encodes information about a swap device or file for memory paging controlled and
supervised by systemd.
This man page lists the configuration options specific to this unit type. See systemd.unit(5) for the common options of all unit
configuration files. The common configuration items are configured in the generic [Unit] and [Install] sections. The swap specific
configuration options are configured in the [Swap] section.
Additional options are listed in systemd.exec(5), which define the execution environment the swapon(8) binary is executed in, and in
systemd.kill(5), which define the way the processes are terminated, and in systemd.resource-control(5), which configure resource control
settings for the processes of the service.
Swap units must be named after the devices or files they control. Example: the swap device /dev/sda5 must be configured in a unit file
dev-sda5.swap. For details about the escaping logic used to convert a file system path to a unit name, see systemd.unit(5).
All swap units automatically get the appropriate dependencies on the devices or on the mount points of the files they are activated from.
Swap units with DefaultDependencies= enabled implicitly acquire a conflicting dependency to umount.target so that they are deactivated at
shutdown.
FSTAB
Swap units may either be configured via unit files, or via /etc/fstab (see fstab(5) for details). Swaps listed in /etc/fstab will be
converted into native units dynamically at boot and when the configuration of the system manager is reloaded. See systemd-fstab-
generator(8) for details about the conversion.
If a swap device or file is configured in both /etc/fstab and a unit file, the configuration in the latter takes precedence.
Unless the noauto option is set for them all swap units configured in /etc/fstab are also added as requirements to swap.target, so that
they are waited for and activated during boot.
OPTIONS
Swap files must include a [Swap] section, which carries information about the swap device it supervises. A number of options that may be
used in this section are shared with other unit types. These options are documented in systemd.exec(5) and systemd.kill(5). The options
specific to the [Swap] section of swap units are the following:
What=
Takes an absolute path of a device node or file to use for paging. See swapon(8) for details. If this refers to a device node, a
dependency on the respective device unit is automatically created. (See systemd.device(5) for more information.) If this refers to a
file, a dependency on the respective mount unit is automatically created. (See systemd.mount(5) for more information.) This option is
mandatory.
Priority=
Swap priority to use when activating the swap device or file. This takes an integer. This setting is optional.
TimeoutSec=
Configures the time to wait for the swapon command to finish. If a command does not exit within the configured time, the swap will be
considered failed and be shut down again. All commands still running will be terminated forcibly via SIGTERM, and after another delay
of this time with SIGKILL. (See KillMode= in systemd.kill(5).) Takes a unit-less value in seconds, or a time span value such as "5min
20s". Pass 0 to disable the timeout logic. Defaults to TimeoutStartSec= in manager configuration file.
Check systemd.exec(5) and systemd.kill(5) for more settings.
SEE ALSO systemd(1), systemctl(8), systemd.unit(5), systemd.exec(5), systemd.kill(5), systemd.resource-control(5), systemd.device(5),
systemd.mount(5), swapon(8), systemd-fstab-generator(8), systemd.directives(7)systemd 208SYSTEMD.SWAP(5)