I discovered cifs module parameter
parm: CIFSMaxBufSize:Network buffer size (not including header). Default: 16384 Range: 8192 to 130048 (int)
But really it defaults to 4096.
I created /etc/modprobe.d/cifs.conf with
options cifs CIFSMaxBufSize=130048
Also I used cifs mount options rsize=130048,wsize=130048.
After setting rsize to max 130048, performance increases!
This problem still present in 10.10.
I discovered cifs module parameter Network buffer size (not including header). Default: 16384 Range: 8192 to 130048 (int)
parm: CIFSMaxBufSize:
But really it defaults to 4096.
I created /etc/modprobe. d/cifs. conf with 130048
options cifs CIFSMaxBufSize=
Also I used cifs mount options rsize=130048, wsize=130048.
After setting rsize to max 130048, performance increases!