Samba performance very poor (AC68u, last stock fw)

[webbie]

Hello

After some tests I am concerned about my samba performance which is far from expected.

Setup. Last stock fw 3.0.0.4.385.20633, ethernet connection to a macbook pro (mojave). External disk connected to usb2. Samba defined in Asus.
My Ram with this configuration is pretty high. Around 50%.

What i observe;

1) Open a samba connection v1 via cifs://SMBHDD/Backup. I check in terminal that it is ok.

SERVER_NAME SMBHDD
USER_ID 501
SMB_NEGOTIATE SMBV_NEG_SMB1_ENABLED
SMB_VERSION SMB_1
SMB_SHARE_TYPE UNKNOWN
EXTENDED_SECURITY_SUPPORTED TRUE
UNIX_SUPPORT TRUE
LARGE_FILE_SUPPORTED TRUE

Then copy a 50MB file from macbook hdd to external disk through ASUS samba. What I see is that the first 10MB takes one second, then the next 10MB also a second. But then it slows drastically, and only increases 0.1MB every few seconds... Minutes to finish it.

2) I try the same but with samba 2: smb://SMBHDD/Backup. I check again:

SERVER_NAME SMBHDD
USER_ID 501
SMB_NEGOTIATE SMBV_NEG_SMB1_ENABLED
SMB_NEGOTIATE SMBV_NEG_SMB2_ENABLED
SMB_NEGOTIATE SMBV_NEG_SMB3_ENABLED
SMB_VERSION SMB_2.002
SMB_SHARE_TYPE DISK
SIGNING_SUPPORTED TRUE
EXTENDED_SECURITY_SUPPORTED TRUE
LARGE_FILE_SUPPORTED TRUE
FILE_IDS_SUPPORTED TRUE

Previously I've written [default] signing_required=no in numb.conf.

Then I copy the same file. And it does exactly the same! First 20MB in 2 seconds and then it takes forever to finish...

I have looked at the CPU and RAM usage. During the process, RAM is around 70% and CPU 1/2 are 20/80. Neither of them touches 100%.

Anyone can explain this? Why is it slowing so much? What can i try?
Thanks a lot!

 

[ColinTaylor]

Try plugging your drive into the USB 3 socket instead. Is your HDD a USB 2 device?

Test the transfer speed from other devices to determine whether it's the macbook that's the problem.

 

[webbie]

Wow. What a good advice.

Just today I have my work computer at home, a windows 10. I have connected to the ethernet, and transfer a 600MB file in 25 seconds. With a sustained rate of 25MB/s.

I could connect a USB3 in the other connector but first of all I should reproduce this in the mac.

This is an excellent result (I know that a NAS will get much more but for my use it will be fine)

Unfortunately mac doesn't seem to get this values!

Now I should find out if this is definite or I can improve it...

Thanks!