Poor Samba performance

[aunsoenr]

I recently rebuilt my freenas server and have been having poor samba performance.

I have an hp z620:

e5-2680 cpu (8 cores, 16 threads), 2.8ghz
128gb ddr3 ram
jails on 240gb ssd
o/s on 16gb ssd

When i try to transfer files It starts at 100mbps, then gradually slows to a crawl, any ideas?

 

[seanm]

What are you copying? I have found that performance copying 1 big file vs a folder of many small files can give very different numbers (4x worse) even if the overall size is the same. You might try that test.

 

[aunsoenr]

What are you copying? I have found that performance copying 1 big file vs a folder of many small files can give very different numbers (4x worse) even if the overall size is the same. You might try that test.

I am copying 1 large file

 

[seanm]

Is your performance bad writing or reading? or both?

Have you tried using 'iperf' to make sure your networking speed is ok?

 

[aunsoenr]

Is your performance bad writing or reading? or both?

Have you tried using 'iperf' to make sure your networking speed is ok?

yes its gigabit

 

[seanm]

Have you read this thread? https://www.ixsystems.com/community/threads/slow-cifs-performance-small-files.42990/

 

[aunsoenr]

Have you read this thread? https://www.ixsystems.com/community/threads/slow-cifs-performance-small-files.42990/

Yes, doesn't apply since I am having these slow downs when reading ONE BIG FILE.

 

[seanm]

That doesn't mean none of the thread is relevant, there's lots of nuggets in there...