How do I increase my client UDP receive buffer size in Ubuntu
I have a computer that communicates with a camera via UDP via a physical cable (no router or switch). The camera acts as the UDP server with the computer as client. Once in a while the system hangs while an image is being transferred, line by line. My Java software waits for a line of the image that is never received and I believe this could be caused by receive buffer overflow.
I've tried to increase the receive buffer maximum size in /etc/sysctl.conf
sysctl -w net.core.rmem 1000000
My program requests 7000000 bytes by but at runtime reports that it received only 212992 bytes.
When I try to ask the OS the min, default, and maximum size:
sysctl -a | grep usb
net.ipv4.udp mem 185535 247780 371670
How do I get a larger buffer? Is sysctl even being read?
TIA
ubuntu-14.04 udp buffer
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
add a comment |
I have a computer that communicates with a camera via UDP via a physical cable (no router or switch). The camera acts as the UDP server with the computer as client. Once in a while the system hangs while an image is being transferred, line by line. My Java software waits for a line of the image that is never received and I believe this could be caused by receive buffer overflow.
I've tried to increase the receive buffer maximum size in /etc/sysctl.conf
sysctl -w net.core.rmem 1000000
My program requests 7000000 bytes by but at runtime reports that it received only 212992 bytes.
When I try to ask the OS the min, default, and maximum size:
sysctl -a | grep usb
net.ipv4.udp mem 185535 247780 371670
How do I get a larger buffer? Is sysctl even being read?
TIA
ubuntu-14.04 udp buffer
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
add a comment |
I have a computer that communicates with a camera via UDP via a physical cable (no router or switch). The camera acts as the UDP server with the computer as client. Once in a while the system hangs while an image is being transferred, line by line. My Java software waits for a line of the image that is never received and I believe this could be caused by receive buffer overflow.
I've tried to increase the receive buffer maximum size in /etc/sysctl.conf
sysctl -w net.core.rmem 1000000
My program requests 7000000 bytes by but at runtime reports that it received only 212992 bytes.
When I try to ask the OS the min, default, and maximum size:
sysctl -a | grep usb
net.ipv4.udp mem 185535 247780 371670
How do I get a larger buffer? Is sysctl even being read?
TIA
ubuntu-14.04 udp buffer
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
I have a computer that communicates with a camera via UDP via a physical cable (no router or switch). The camera acts as the UDP server with the computer as client. Once in a while the system hangs while an image is being transferred, line by line. My Java software waits for a line of the image that is never received and I believe this could be caused by receive buffer overflow.
I've tried to increase the receive buffer maximum size in /etc/sysctl.conf
sysctl -w net.core.rmem 1000000
My program requests 7000000 bytes by but at runtime reports that it received only 212992 bytes.
When I try to ask the OS the min, default, and maximum size:
sysctl -a | grep usb
net.ipv4.udp mem 185535 247780 371670
How do I get a larger buffer? Is sysctl even being read?
TIA
ubuntu-14.04 udp buffer
ubuntu-14.04 udp buffer
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
asked Feb 1 at 18:24
Nate LockwoodNate Lockwood
144118
144118
add a comment |
add a comment |
1 Answer
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The edit to /etc/sysctl.conf was in error, it should have read as below and I should have increased the default value as well:
net.core.rmem_max=1000000
net.core.rmem_default=1000000
I don't know why the below wouldn't work when I entered it by hand but I wanted the values to be set at boot anyway.
sysctl -w net.core.rmem 1000000
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
add a comment |
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1 Answer
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1 Answer
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votes
The edit to /etc/sysctl.conf was in error, it should have read as below and I should have increased the default value as well:
net.core.rmem_max=1000000
net.core.rmem_default=1000000
I don't know why the below wouldn't work when I entered it by hand but I wanted the values to be set at boot anyway.
sysctl -w net.core.rmem 1000000
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
add a comment |
The edit to /etc/sysctl.conf was in error, it should have read as below and I should have increased the default value as well:
net.core.rmem_max=1000000
net.core.rmem_default=1000000
I don't know why the below wouldn't work when I entered it by hand but I wanted the values to be set at boot anyway.
sysctl -w net.core.rmem 1000000
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
add a comment |
The edit to /etc/sysctl.conf was in error, it should have read as below and I should have increased the default value as well:
net.core.rmem_max=1000000
net.core.rmem_default=1000000
I don't know why the below wouldn't work when I entered it by hand but I wanted the values to be set at boot anyway.
sysctl -w net.core.rmem 1000000
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
The edit to /etc/sysctl.conf was in error, it should have read as below and I should have increased the default value as well:
net.core.rmem_max=1000000
net.core.rmem_default=1000000
I don't know why the below wouldn't work when I entered it by hand but I wanted the values to be set at boot anyway.
sysctl -w net.core.rmem 1000000
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
answered Feb 6 at 17:30
Nate LockwoodNate Lockwood
144118
144118
add a comment |
add a comment |
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