Docker Container's Memory Swappiness value outside of documented range
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When I do docker inspectI read that
Ubuntu 16.04.4 LTS
Docker version 17.05.0-ce, build 89658be
# GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
"MemorySwappiness": -1,
or
Ubuntu 17.10
Docker version 17.09.0-ce, build afdb6d4
GRUB_CMDLINE_LINUX=""
"MemorySwappiness": null,
However the Documentation states that it is a value between 0 and 100.
The second example might result from Swapping being disabled on the docker host.
- Am I missing some paragraph of documentation?
- Are these undocumented values cast to 0? Or 100?
docker
asked Apr 26 at 11:12
Björn
1066
add a comment |Â
up vote
1
down vote
favorite
When I do docker inspectI read that
Ubuntu 16.04.4 LTS
Docker version 17.05.0-ce, build 89658be
# GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
"MemorySwappiness": -1,
or
Ubuntu 17.10
Docker version 17.09.0-ce, build afdb6d4
GRUB_CMDLINE_LINUX=""
"MemorySwappiness": null,
However the Documentation states that it is a value between 0 and 100.
The second example might result from Swapping being disabled on the docker host.
- Am I missing some paragraph of documentation?
- Are these undocumented values cast to 0? Or 100?
docker
asked Apr 26 at 11:12
Björn
1066
Probably because your kernel doesn't support memory swap and memory limit ("By default, if you do not set --memory-swappiness, the value is inherited from the host machine.") - docs.docker.com/config/containers/resource_constraints/…
– ponsfrilus
Apr 26 at 11:15
Probably. But how can I inherit a value of-1if valid values rangefrom 0 to 100The value appears to be undocumented or I appear to fail at reading :-)
– Björn
Apr 27 at 8:30
Apparently -1 is the default value, docker engine somehow also treats null as -1. Docker is made by human, you can open a git issue to ask them to better document this part.
– storm
Apr 30 at 9:23
Sorry forgot the link
– storm
Apr 30 at 9:25
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
When I do docker inspectI read that
Ubuntu 16.04.4 LTS
Docker version 17.05.0-ce, build 89658be
# GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
"MemorySwappiness": -1,
or
Ubuntu 17.10
Docker version 17.09.0-ce, build afdb6d4
GRUB_CMDLINE_LINUX=""
"MemorySwappiness": null,
However the Documentation states that it is a value between 0 and 100.
The second example might result from Swapping being disabled on the docker host.
- Am I missing some paragraph of documentation?
- Are these undocumented values cast to 0? Or 100?
docker
asked Apr 26 at 11:12
Björn
1066
When I do docker inspectI read that
Ubuntu 16.04.4 LTS
Docker version 17.05.0-ce, build 89658be
# GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1"
"MemorySwappiness": -1,
or
Ubuntu 17.10
Docker version 17.09.0-ce, build afdb6d4
GRUB_CMDLINE_LINUX=""
"MemorySwappiness": null,
However the Documentation states that it is a value between 0 and 100.
The second example might result from Swapping being disabled on the docker host.
- Am I missing some paragraph of documentation?
- Are these undocumented values cast to 0? Or 100?
docker
asked Apr 26 at 11:12
Björn
1066
edited Apr 30 at 9:15
asked Apr 26 at 11:12
Björn
1066
asked Apr 26 at 11:12
Björn
1066
asked Apr 26 at 11:12
Björn
1066
1066
Probably because your kernel doesn't support memory swap and memory limit ("By default, if you do not set --memory-swappiness, the value is inherited from the host machine.") - docs.docker.com/config/containers/resource_constraints/…
– ponsfrilus
Apr 26 at 11:15
Probably. But how can I inherit a value of-1if valid values rangefrom 0 to 100The value appears to be undocumented or I appear to fail at reading :-)
– Björn
Apr 27 at 8:30
Apparently -1 is the default value, docker engine somehow also treats null as -1. Docker is made by human, you can open a git issue to ask them to better document this part.
– storm
Apr 30 at 9:23
Sorry forgot the link
– storm
Apr 30 at 9:25
add a comment |Â
Probably because your kernel doesn't support memory swap and memory limit ("By default, if you do not set --memory-swappiness, the value is inherited from the host machine.") - docs.docker.com/config/containers/resource_constraints/…
– ponsfrilus
Apr 26 at 11:15
Probably. But how can I inherit a value of-1if valid values rangefrom 0 to 100The value appears to be undocumented or I appear to fail at reading :-)
– Björn
Apr 27 at 8:30
Apparently -1 is the default value, docker engine somehow also treats null as -1. Docker is made by human, you can open a git issue to ask them to better document this part.
– storm
Apr 30 at 9:23
Sorry forgot the link
– storm
Apr 30 at 9:25
Probably because your kernel doesn't support memory swap and memory limit ("By default, if you do not set --memory-swappiness, the value is inherited from the host machine.") - docs.docker.com/config/containers/resource_constraints/…
– ponsfrilus
Apr 26 at 11:15
Probably because your kernel doesn't support memory swap and memory limit ("By default, if you do not set --memory-swappiness, the value is inherited from the host machine.") - docs.docker.com/config/containers/resource_constraints/…
– ponsfrilus
Apr 26 at 11:15
Probably. But how can I inherit a value of
-1 if valid values range from 0 to 100 The value appears to be undocumented or I appear to fail at reading :-)– Björn
Apr 27 at 8:30
Probably. But how can I inherit a value of
-1 if valid values range from 0 to 100 The value appears to be undocumented or I appear to fail at reading :-)– Björn
Apr 27 at 8:30
Apparently -1 is the default value, docker engine somehow also treats null as -1. Docker is made by human, you can open a git issue to ask them to better document this part.
– storm
Apr 30 at 9:23
Apparently -1 is the default value, docker engine somehow also treats null as -1. Docker is made by human, you can open a git issue to ask them to better document this part.
– storm
Apr 30 at 9:23
Sorry forgot the link
– storm
Apr 30 at 9:25
Sorry forgot the link
– storm
Apr 30 at 9:25
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
0
down vote
accepted
-1 is a deprecated value. As you can see in this issue 0 is the new -1
https://github.com/moby/moby/pull/33898
answered May 16 at 11:08
Björn
1066
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
-1 is a deprecated value. As you can see in this issue 0 is the new -1
https://github.com/moby/moby/pull/33898
answered May 16 at 11:08
Björn
1066
add a comment |Â
up vote
0
down vote
accepted
-1 is a deprecated value. As you can see in this issue 0 is the new -1
https://github.com/moby/moby/pull/33898
answered May 16 at 11:08
Björn
1066
add a comment |Â
up vote
0
down vote
accepted
up vote
0
down vote
accepted
-1 is a deprecated value. As you can see in this issue 0 is the new -1
https://github.com/moby/moby/pull/33898
answered May 16 at 11:08
Björn
1066
-1 is a deprecated value. As you can see in this issue 0 is the new -1
https://github.com/moby/moby/pull/33898
answered May 16 at 11:08
Björn
1066
answered May 16 at 11:08
Björn
1066
answered May 16 at 11:08
Björn
1066
answered May 16 at 11:08
Björn
1066
1066
add a comment |Â
add a comment |Â
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Probably because your kernel doesn't support memory swap and memory limit ("By default, if you do not set --memory-swappiness, the value is inherited from the host machine.") - docs.docker.com/config/containers/resource_constraints/…
– ponsfrilus
Apr 26 at 11:15
Probably. But how can I inherit a value of
-1if valid values rangefrom 0 to 100The value appears to be undocumented or I appear to fail at reading :-)– Björn
Apr 27 at 8:30
Apparently -1 is the default value, docker engine somehow also treats null as -1. Docker is made by human, you can open a git issue to ask them to better document this part.
– storm
Apr 30 at 9:23
Sorry forgot the link
– storm
Apr 30 at 9:25