Sudden performance drop

[mediamadman]

After recently adding another SSD to my cache pool and turning on SSL/HTTPS for the webgui, my read and write speeds dropped dramatically. I do not think it is directly tied to either of those modifications, but after multiple reboots something is just not right anymore. I am getting 2MB reads and 7-8MB write speeds on my array shares. I have re-seated all connections to the drive as I thought I might of knocked one a little loose or something. Not sure what to look into next.  Any help is appreciated.

diagnostics-20190807-0211.zip

[trurl]

Parity

Serial Number:    W1H40H6Y
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
184 End-to-End_Error        -O--CK   099   099   099    NOW  1

 

[mediamadman]

I will replace the failing parity drive. I can see how that would kill my writes, but a failing parity causes poor reads also?

[trurl]

1 minute ago, mediamadman said:

failing parity causes poor reads also?

No

[trurl]

Do those diagnostics include the time you were experiencing the poor reads? Syslog isn't very long and I didn't see any I/O problems in it.

[mediamadman]

Probably not. I will post a new one after the drive replacement.

[mediamadman]

I know it is still doing its rebuild, but this is pretty typical of the read speeds I have been seeing and I also do not see any I/O issues in the logs.

 

diagnostics-20190807-0301.zip

[itimpi]

If you have a rebuild running then I would EXPECT any copying speeds to be terrible!

[trurl]

9 hours ago, itimpi said:

If you have a rebuild running then I would EXPECT any copying speeds to be terrible!

And the rebuild speed will also be affected by the copying. Wait for rebuild to complete before doing any more testing.

[mediamadman]

Looks like the replacement drive I used that was laying around is another old bad drive. I have a new drive being delivered today, so I will throw that one in and see where I am at after that rebuilds.

[mediamadman]

After the replacement/rebuild my speeds are back up to normal. Thanks for the quick help trurl.