Memcached on AWS ElastiCache swap usage high even after rebootmemcached memory usage difference on 32- and...
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Memcached on AWS ElastiCache swap usage high even after reboot
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I have Memcached t2.small node on AWS Elasticache and because the swap was running high about 190 megabytes, so a few days ago I have added a second node.
That did not help and the swap usage and everything else was running pretty much unchanged even though I have added the second node.
The new node is using very little memory and no swap usage at all. This morning I have rebooted the original node and while everything was cleared, the swap usage dropped from 190 to only about 52 megabytes.
The questions are:
Why the swap was not cleared to zero?
Why still 50Mb swap usage if there is all that free memory after the reboot?
Not that it makes a big difference, but I was expecting the swap to be completely flushed, especially since the new node is running for 5 days without any swap.
Image showing the drop to 50Mb after reboot.
amazon-web-services elastic-beanstalk memcached redis
asked 6 hours ago
WayBehindWayBehind
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I have Memcached t2.small node on AWS Elasticache and because the swap was running high about 190 megabytes, so a few days ago I have added a second node.
That did not help and the swap usage and everything else was running pretty much unchanged even though I have added the second node.
The new node is using very little memory and no swap usage at all. This morning I have rebooted the original node and while everything was cleared, the swap usage dropped from 190 to only about 52 megabytes.
The questions are:
Why the swap was not cleared to zero?
Why still 50Mb swap usage if there is all that free memory after the reboot?
Not that it makes a big difference, but I was expecting the swap to be completely flushed, especially since the new node is running for 5 days without any swap.
Image showing the drop to 50Mb after reboot.
amazon-web-services elastic-beanstalk memcached redis
asked 6 hours ago
WayBehindWayBehind
1011
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Is having swap causing a problem? My understanding is an operating system will put blocks into swap that it hasn't used for some time, freeing memory for useful data. I think having more data in swap is a good thing, leaving more memory for caching, rather than say having unused device drivers sitting in RAM.
– Tim
6 hours ago
add a comment |
I have Memcached t2.small node on AWS Elasticache and because the swap was running high about 190 megabytes, so a few days ago I have added a second node.
That did not help and the swap usage and everything else was running pretty much unchanged even though I have added the second node.
The new node is using very little memory and no swap usage at all. This morning I have rebooted the original node and while everything was cleared, the swap usage dropped from 190 to only about 52 megabytes.
The questions are:
Why the swap was not cleared to zero?
Why still 50Mb swap usage if there is all that free memory after the reboot?
Not that it makes a big difference, but I was expecting the swap to be completely flushed, especially since the new node is running for 5 days without any swap.
Image showing the drop to 50Mb after reboot.
amazon-web-services elastic-beanstalk memcached redis
asked 6 hours ago
WayBehindWayBehind
1011
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have Memcached t2.small node on AWS Elasticache and because the swap was running high about 190 megabytes, so a few days ago I have added a second node.
That did not help and the swap usage and everything else was running pretty much unchanged even though I have added the second node.
The new node is using very little memory and no swap usage at all. This morning I have rebooted the original node and while everything was cleared, the swap usage dropped from 190 to only about 52 megabytes.
The questions are:
Why the swap was not cleared to zero?
Why still 50Mb swap usage if there is all that free memory after the reboot?
Not that it makes a big difference, but I was expecting the swap to be completely flushed, especially since the new node is running for 5 days without any swap.
Image showing the drop to 50Mb after reboot.
amazon-web-services elastic-beanstalk memcached redis
amazon-web-services elastic-beanstalk memcached redis
asked 6 hours ago
WayBehindWayBehind
1011
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 6 hours ago
WayBehindWayBehind
1011
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
WayBehind
asked 6 hours ago
WayBehindWayBehind
1011
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 6 hours ago
WayBehindWayBehind
1011
asked 6 hours ago
WayBehindWayBehind
1011
1011
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
WayBehind is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Is having swap causing a problem? My understanding is an operating system will put blocks into swap that it hasn't used for some time, freeing memory for useful data. I think having more data in swap is a good thing, leaving more memory for caching, rather than say having unused device drivers sitting in RAM.
– Tim
6 hours ago
add a comment |
Is having swap causing a problem? My understanding is an operating system will put blocks into swap that it hasn't used for some time, freeing memory for useful data. I think having more data in swap is a good thing, leaving more memory for caching, rather than say having unused device drivers sitting in RAM.
– Tim
6 hours ago
Is having swap causing a problem? My understanding is an operating system will put blocks into swap that it hasn't used for some time, freeing memory for useful data. I think having more data in swap is a good thing, leaving more memory for caching, rather than say having unused device drivers sitting in RAM.
– Tim
6 hours ago
Is having swap causing a problem? My understanding is an operating system will put blocks into swap that it hasn't used for some time, freeing memory for useful data. I think having more data in swap is a good thing, leaving more memory for caching, rather than say having unused device drivers sitting in RAM.
– Tim
6 hours ago
add a comment |
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Is having swap causing a problem? My understanding is an operating system will put blocks into swap that it hasn't used for some time, freeing memory for useful data. I think having more data in swap is a good thing, leaving more memory for caching, rather than say having unused device drivers sitting in RAM.
– Tim
6 hours ago