Current 16.2.6442 web interface still slow
Problem reported by echoDreamz - August 23, 2017 at 9:04 AM
We still have constant complaints that the web interface is still painfully slow. I've experienced myself watching the spinning chaser go on and on for ~30 - 60 seconds. Watching the server while this is happening shows no high CPU (~12 - 20%), barely any usage on the SM service and IIS worker, our primary SM installation drive (an NVME RAID) is doing nothing but twiddling its thumbs and our main storage array is also not really doing much.
I watched and logged a period over an hour, the disk queue on mail storage never went above 2 (24x 1TB SAS RAID 10), the queue on the primary installation drive never goes above 0, CPU stayed below 39%, there is just nothing physically on the server that seems to be holding SM back. I even went as far as contacting BroadCom (LSI) and had them review the controller to make sure it was not bottlenecked and they stated that the controller processor is only at max over a 24 hour period at 39% (and that was during an intensive backup operation).
This is doing silly things like opening a folder that has no emails in it, somehow takes ~30 seconds, switching between folders is a nightmare, have numerous complaints that sending emails (with no attachments) takes minutes sometimes. Even customers with decently powerful machines are complaining of load times now and across all browsers.
I am still not sure that a single worker process is the way to go, it seems that having webmail, EWS, EAS, WebDav for CalDAV etc. (possibly other items as well?) running over a single worker process can hurt a single worker? Back when I tested 2 workers, it did "feel" like it improved services, numerous customers reported it felt snappier and that the spinny ball of death nearly went away.
Are there any SM 16 users still experiencing slowness?


6 Replies

Reply to Thread
Perhaps time to go back to V15?
Rod Lasky Replied
Employee Post
Something I've seen that will help is to enable Dynamic Content Compression in IIS. 
Go to Server Manager >> Add Roles and Features >> Server Roles / Web Server (IIS) >> Web Server >> Performance.
Afterwards, give IIS a bounce.
Rod Lasky
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278
This is becoming a huge problem for us.  We've been getting complaints daily since we migrated and we've got clients that want us to move them to something that works better.  I can't say that I blame them as I've experienced the poor performance myself.  It's completely unacceptable.
I also think it's particularly shameful that two of the primary features of the new web interface advertised on their web site are "powerful performance" and "faster than any previous version". Pfff
It's mind boggling that either no one noticed the problems or they launched the new system knowing the performance was terrible.  One or the other must be true and it's really disappointing.  After 10 years on this platform, I'm being forced to look at alternative solutions.
Bummer to hear v 16.x still slow. We've been waiting for confident word that performance issues have been solved before upgrading. We'll hang tight.
thought i'd check the forums before upgrading this morning - we too will be delaying rollout to 16.x until this is resolved...
making any progress too fixing this slow problem ...?
nov 9 update still no love ..
the performance of the web interface is horrible .
takes 15 secs for login to populate .

Reply to Thread