10 to 15 seconds for opening a mail, which you see in your mailbox actually, is definitely too long. But I do not think, that this is related to Groupwise directly but maybe to a network problem. Of course Grouwise got slower over the time. I think somewhere in the transition from 18.0 to 18.5 there was a noticeable slowdown. The longest times I observe, is, if I change folders in the client pane. If the folder contains more than 30.000 mails it needs around 7 to 8 seconds till the folder is displayed - and that on a 10GBit connection to the mail server. In previous versions the time to switch folders was almost unnoticeable.

Quite a time before we had problems with Groupwise and a Cisco switch, that sat between two MTAs. We wondered, why it took so long time to send small emails to mail recipients over the internet. After checking everything, we discovered, that for a still unknown reason the bottleneck was the connection beween the MTAs over this switch. All other traffic - internet surfing, file transfers via ncp or smb/cifs or ftp, ssh etc. - had no perormance issues over this switch, but Groupwise message transfers were incredible slow with a multitude of unnecessary fragmentations. We exchanged the switch and all problems were gone. We did not dig further into the issue as the switch was already out of warranty, but the real strange thing was, that only Groupwise traffic was affected and there was for sure no traffic-prioritization configured.

10 to 15 seconds for opening a mail, which you see in your mailbox actually, is definitely too long. But I do not think, that this is related to Groupwise directly but maybe to a network problem. Of course Grouwise got slower over the time. I think somewhere in the transition from 18.0 to 18.5 there was a noticeable slowdown. The longest times I observe, is, if I change folders in the client pane. If the folder contains more than 30.000 mails it needs around 7 to 8 seconds till the folder is displayed - and that on a 10GBit connection to the mail server. In previous versions the time to switch folders was almost unnoticeable.

Quite a time before we had problems with Groupwise and a Cisco switch, that sat between two MTAs. We wondered, why it took so long time to send small emails to mail recipients over the internet. After checking everything, we discovered, that for a still unknown reason the bottleneck was the connection beween the MTAs over this switch. All other traffic - internet surfing, file transfers via ncp or smb/cifs or ftp, ssh etc. - had no perormance issues over this switch, but Groupwise message transfers were incredible slow with a multitude of unnecessary fragmentations. We exchanged the switch and all problems were gone. We did not dig further into the issue as the switch was already out of warranty, but the real strange thing was, that only Groupwise traffic was affected and there was for sure no traffic-prioritization configured.