Swapping takes 20% of cpu cycles, is this thrashing? [closed]
I run a long bootstrapping compilation. I have 16G of physical memory but my main process attains 32G virtual memory.
UPDATE (response to Austin Hemmelgarn's comment): This is on a two core Intel Xeon E5-4610 CPU @ 2.30 GHz.
If kswapd0 uses about 20% of cpu cycles on this Linux machine, does this mean thrashing? Can I fix this other than installing new RAM modules?
UPDATE2 vmstat 1 shows 10 to 20 000 swapin and 0 to 30 000 swapout
linux swap
asked Dec 18 at 9:59
Gergely
354314
closed as unclear what you're asking by Rui F Ribeiro, schily, Kusalananda, Thomas, Christopher Dec 18 at 21:18
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
I run a long bootstrapping compilation. I have 16G of physical memory but my main process attains 32G virtual memory.
UPDATE (response to Austin Hemmelgarn's comment): This is on a two core Intel Xeon E5-4610 CPU @ 2.30 GHz.
If kswapd0 uses about 20% of cpu cycles on this Linux machine, does this mean thrashing? Can I fix this other than installing new RAM modules?
UPDATE2 vmstat 1 shows 10 to 20 000 swapin and 0 to 30 000 swapout
linux swap
asked Dec 18 at 9:59
Gergely
354314
closed as unclear what you're asking by Rui F Ribeiro, schily, Kusalananda, Thomas, Christopher Dec 18 at 21:18
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
It could be worse, it could be better. Could be worth seeing if you can do something to improve it, but if it only takes 20% longer, is it worth it?
– ctrl-alt-delor
Dec 18 at 10:26
Some extra info about the system would be helpful. 20% CPU utilization on a Core i7 is very different from 20% CPU utilization on an Atom, and when swapping is involved your storage configuration may matter too.
– Austin Hemmelgarn
Dec 18 at 20:31
Run 'vmstat 1' for 10s or so and observe the 'swap' column - it has two sub-columns 'si' and 'so' for swap-in and swap-out.
– wef
Dec 19 at 7:59
Helló :-) Since somewhere linux 3.0 I experienced that as if also disk load would somehow influence that shown cpu usage, what I consider bad.
– peterh
Dec 19 at 11:18
add a comment |
I run a long bootstrapping compilation. I have 16G of physical memory but my main process attains 32G virtual memory.
UPDATE (response to Austin Hemmelgarn's comment): This is on a two core Intel Xeon E5-4610 CPU @ 2.30 GHz.
If kswapd0 uses about 20% of cpu cycles on this Linux machine, does this mean thrashing? Can I fix this other than installing new RAM modules?
UPDATE2 vmstat 1 shows 10 to 20 000 swapin and 0 to 30 000 swapout
linux swap
asked Dec 18 at 9:59
Gergely
354314
I run a long bootstrapping compilation. I have 16G of physical memory but my main process attains 32G virtual memory.
UPDATE (response to Austin Hemmelgarn's comment): This is on a two core Intel Xeon E5-4610 CPU @ 2.30 GHz.
If kswapd0 uses about 20% of cpu cycles on this Linux machine, does this mean thrashing? Can I fix this other than installing new RAM modules?
UPDATE2 vmstat 1 shows 10 to 20 000 swapin and 0 to 30 000 swapout
linux swap
linux swap
asked Dec 18 at 9:59
Gergely
354314
asked Dec 18 at 9:59
Gergely
354314
edited Dec 19 at 8:49
asked Dec 18 at 9:59
Gergely
354314
asked Dec 18 at 9:59
Gergely
354314
asked Dec 18 at 9:59
Gergely
354314
354314
closed as unclear what you're asking by Rui F Ribeiro, schily, Kusalananda, Thomas, Christopher Dec 18 at 21:18
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as unclear what you're asking by Rui F Ribeiro, schily, Kusalananda, Thomas, Christopher Dec 18 at 21:18
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
It could be worse, it could be better. Could be worth seeing if you can do something to improve it, but if it only takes 20% longer, is it worth it?
– ctrl-alt-delor
Dec 18 at 10:26
Some extra info about the system would be helpful. 20% CPU utilization on a Core i7 is very different from 20% CPU utilization on an Atom, and when swapping is involved your storage configuration may matter too.
– Austin Hemmelgarn
Dec 18 at 20:31
Run 'vmstat 1' for 10s or so and observe the 'swap' column - it has two sub-columns 'si' and 'so' for swap-in and swap-out.
– wef
Dec 19 at 7:59
Helló :-) Since somewhere linux 3.0 I experienced that as if also disk load would somehow influence that shown cpu usage, what I consider bad.
– peterh
Dec 19 at 11:18
add a comment |
It could be worse, it could be better. Could be worth seeing if you can do something to improve it, but if it only takes 20% longer, is it worth it?
– ctrl-alt-delor
Dec 18 at 10:26
Some extra info about the system would be helpful. 20% CPU utilization on a Core i7 is very different from 20% CPU utilization on an Atom, and when swapping is involved your storage configuration may matter too.
– Austin Hemmelgarn
Dec 18 at 20:31
Run 'vmstat 1' for 10s or so and observe the 'swap' column - it has two sub-columns 'si' and 'so' for swap-in and swap-out.
– wef
Dec 19 at 7:59
Helló :-) Since somewhere linux 3.0 I experienced that as if also disk load would somehow influence that shown cpu usage, what I consider bad.
– peterh
Dec 19 at 11:18
It could be worse, it could be better. Could be worth seeing if you can do something to improve it, but if it only takes 20% longer, is it worth it?
– ctrl-alt-delor
Dec 18 at 10:26
It could be worse, it could be better. Could be worth seeing if you can do something to improve it, but if it only takes 20% longer, is it worth it?
– ctrl-alt-delor
Dec 18 at 10:26
Some extra info about the system would be helpful. 20% CPU utilization on a Core i7 is very different from 20% CPU utilization on an Atom, and when swapping is involved your storage configuration may matter too.
– Austin Hemmelgarn
Dec 18 at 20:31
Some extra info about the system would be helpful. 20% CPU utilization on a Core i7 is very different from 20% CPU utilization on an Atom, and when swapping is involved your storage configuration may matter too.
– Austin Hemmelgarn
Dec 18 at 20:31
Run 'vmstat 1' for 10s or so and observe the 'swap' column - it has two sub-columns 'si' and 'so' for swap-in and swap-out.
– wef
Dec 19 at 7:59
Run 'vmstat 1' for 10s or so and observe the 'swap' column - it has two sub-columns 'si' and 'so' for swap-in and swap-out.
– wef
Dec 19 at 7:59
Helló :-) Since somewhere linux 3.0 I experienced that as if also disk load would somehow influence that shown cpu usage, what I consider bad.
– peterh
Dec 19 at 11:18
Helló :-) Since somewhere linux 3.0 I experienced that as if also disk load would somehow influence that shown cpu usage, what I consider bad.
– peterh
Dec 19 at 11:18
add a comment |
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It could be worse, it could be better. Could be worth seeing if you can do something to improve it, but if it only takes 20% longer, is it worth it?
– ctrl-alt-delor
Dec 18 at 10:26
Some extra info about the system would be helpful. 20% CPU utilization on a Core i7 is very different from 20% CPU utilization on an Atom, and when swapping is involved your storage configuration may matter too.
– Austin Hemmelgarn
Dec 18 at 20:31
Run 'vmstat 1' for 10s or so and observe the 'swap' column - it has two sub-columns 'si' and 'so' for swap-in and swap-out.
– wef
Dec 19 at 7:59
Helló :-) Since somewhere linux 3.0 I experienced that as if also disk load would somehow influence that shown cpu usage, what I consider bad.
– peterh
Dec 19 at 11:18