tcp kernel setting for rmem_max and wmem_max not taking effect instantaneously
Hi all
Recently I am working on some SFTP throughput issue and found that by increasing the rmem_max and wmem_max at the receiving server we were able to boost from a SFTP rate of 400KBps to 8.9MBps. But what's weird is during the test, right after I ran echo command, Code:
echo "16777216" > /proc/sys/net/core/rmem_max I was under the impression when I make such changes to kernal params it should take effect instantaneously. But clearly this is not the case here. We are running Arch Linux, but when we tried the same thing on a SUSE10 server we got the same result. Immediately after applying the new kernel param we do not see the speed increase that we are expecting. |
Quote:
The amount of delay depends on the parameter, and what may be active using the facility controlled by the parameter. |
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