I saw sudden increase in the socket's read buffer memory usage for all the existing connection.
ESTAB 2 0 10.10.1.26:43333 10.10.2.203:5337 mem:(r12182,w0,f1914,t0)
Similarly, I found all the ESTABLISHED socket had increase in read memory usage. I check that there wasn't any increase in the number of orphan socket (
cat /proc/net/sockstat )
Can someone tell the reasons why the read memory buffer can increase?