Meaning of the swap part in the top command
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Do you know in which unit the swap column is display in the top output?
According with top documentation it is in KB, but please take a look in the below image.
What means g or m next to the swap value?
Thanks in advance for your kind support
linux top
asked Apr 2 at 16:25
federico
31
add a comment |Â
up vote
0
down vote
favorite
Do you know in which unit the swap column is display in the top output?
According with top documentation it is in KB, but please take a look in the below image.
What means g or m next to the swap value?
Thanks in advance for your kind support
linux top
asked Apr 2 at 16:25
federico
31
3
Please do not post pictures of text. Just paste the text.
– DopeGhoti
Apr 2 at 16:30
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Do you know in which unit the swap column is display in the top output?
According with top documentation it is in KB, but please take a look in the below image.
What means g or m next to the swap value?
Thanks in advance for your kind support
linux top
asked Apr 2 at 16:25
federico
31
Do you know in which unit the swap column is display in the top output?
According with top documentation it is in KB, but please take a look in the below image.
What means g or m next to the swap value?
Thanks in advance for your kind support
linux top
asked Apr 2 at 16:25
federico
31
asked Apr 2 at 16:25
federico
31
asked Apr 2 at 16:25
federico
31
asked Apr 2 at 16:25
federico
31
31
3
Please do not post pictures of text. Just paste the text.
– DopeGhoti
Apr 2 at 16:30
add a comment |Â
3
Please do not post pictures of text. Just paste the text.
– DopeGhoti
Apr 2 at 16:30
3
3
Please do not post pictures of text. Just paste the text.
– DopeGhoti
Apr 2 at 16:30
Please do not post pictures of text. Just paste the text.
– DopeGhoti
Apr 2 at 16:30
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
2
down vote
accepted
If you are referring to the values in the SWAP column, then g means "Gibibytes" (GiB) and m means "Mebibytes" (MiB). This is also true for the values in the header (but the letters used are upper-case).
I believe that it is the base 2-based units rather than the base 10-based units that are in use (judging from the top manual on a Linux system).
According to this ServerFault answer:
Top (at least in some versions) calculates SWAP per process as VIRT - RSS instead of reporting real swap usage. Under Linux the result is a completely meaningless number.
And from another answer at ServerFault:
The top tool uses a broken formula to calculate what it erroneously reports as swap space. It is in fact the result of subtracting the resident set size from the address space size. This is a boneheaded thing to do since one is a measure of virtual memory and the other is a measure of physical memory. So it's not entirely clear what the result is even a measure of at all.
answered Apr 2 at 16:29
Kusalananda
102k13201317
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
If you are referring to the values in the SWAP column, then g means "Gibibytes" (GiB) and m means "Mebibytes" (MiB). This is also true for the values in the header (but the letters used are upper-case).
I believe that it is the base 2-based units rather than the base 10-based units that are in use (judging from the top manual on a Linux system).
According to this ServerFault answer:
Top (at least in some versions) calculates SWAP per process as VIRT - RSS instead of reporting real swap usage. Under Linux the result is a completely meaningless number.
And from another answer at ServerFault:
The top tool uses a broken formula to calculate what it erroneously reports as swap space. It is in fact the result of subtracting the resident set size from the address space size. This is a boneheaded thing to do since one is a measure of virtual memory and the other is a measure of physical memory. So it's not entirely clear what the result is even a measure of at all.
answered Apr 2 at 16:29
Kusalananda
102k13201317
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
add a comment |Â
up vote
2
down vote
accepted
If you are referring to the values in the SWAP column, then g means "Gibibytes" (GiB) and m means "Mebibytes" (MiB). This is also true for the values in the header (but the letters used are upper-case).
I believe that it is the base 2-based units rather than the base 10-based units that are in use (judging from the top manual on a Linux system).
According to this ServerFault answer:
Top (at least in some versions) calculates SWAP per process as VIRT - RSS instead of reporting real swap usage. Under Linux the result is a completely meaningless number.
And from another answer at ServerFault:
The top tool uses a broken formula to calculate what it erroneously reports as swap space. It is in fact the result of subtracting the resident set size from the address space size. This is a boneheaded thing to do since one is a measure of virtual memory and the other is a measure of physical memory. So it's not entirely clear what the result is even a measure of at all.
answered Apr 2 at 16:29
Kusalananda
102k13201317
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
add a comment |Â
up vote
2
down vote
accepted
up vote
2
down vote
accepted
If you are referring to the values in the SWAP column, then g means "Gibibytes" (GiB) and m means "Mebibytes" (MiB). This is also true for the values in the header (but the letters used are upper-case).
I believe that it is the base 2-based units rather than the base 10-based units that are in use (judging from the top manual on a Linux system).
According to this ServerFault answer:
Top (at least in some versions) calculates SWAP per process as VIRT - RSS instead of reporting real swap usage. Under Linux the result is a completely meaningless number.
And from another answer at ServerFault:
The top tool uses a broken formula to calculate what it erroneously reports as swap space. It is in fact the result of subtracting the resident set size from the address space size. This is a boneheaded thing to do since one is a measure of virtual memory and the other is a measure of physical memory. So it's not entirely clear what the result is even a measure of at all.
answered Apr 2 at 16:29
Kusalananda
102k13201317
If you are referring to the values in the SWAP column, then g means "Gibibytes" (GiB) and m means "Mebibytes" (MiB). This is also true for the values in the header (but the letters used are upper-case).
I believe that it is the base 2-based units rather than the base 10-based units that are in use (judging from the top manual on a Linux system).
According to this ServerFault answer:
Top (at least in some versions) calculates SWAP per process as VIRT - RSS instead of reporting real swap usage. Under Linux the result is a completely meaningless number.
And from another answer at ServerFault:
The top tool uses a broken formula to calculate what it erroneously reports as swap space. It is in fact the result of subtracting the resident set size from the address space size. This is a boneheaded thing to do since one is a measure of virtual memory and the other is a measure of physical memory. So it's not entirely clear what the result is even a measure of at all.
answered Apr 2 at 16:29
Kusalananda
102k13201317
edited Apr 2 at 16:46
answered Apr 2 at 16:29
Kusalananda
102k13201317
answered Apr 2 at 16:29
Kusalananda
102k13201317
answered Apr 2 at 16:29
Kusalananda
102k13201317
102k13201317
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
add a comment |Â
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
I referred to the highlighted column, Swap column. In total I have 21GB swap memory, and the first process is using 57g. Could this mean 57GB of swap used?
– federico
Apr 2 at 16:32
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico Ah, I missed that one. It's the same there.
– Kusalananda
Apr 2 at 16:39
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
@federico See updated answer.
– Kusalananda
Apr 2 at 16:46
add a comment |Â
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3
Please do not post pictures of text. Just paste the text.
– DopeGhoti
Apr 2 at 16:30