From what I understand, hotfixes are typically rolled into subsequent releases.
I'll mark this for the PM to review.
Hotfixes always get rolled into a release. When depends on multiple factors. Let me address your main concern on when to upgrade.
We rolled 10.1.1 to introduce some installer enhancements due to some feedback we got on upgrades. Hotfix 1 is not required for all folks as it pertains to alert email data format. Hotfix 2 is recommended to apply.
We are polling more data in 10.1 with fibre channel, VMWare etc. so depending on your environment more polling can add additional load. How many elements are on that poller getting hit hard? Might be time to get another poller.
Also some things going on in the back end are with 10.1 we introduced a few new services for the new collector, which will eventually replace the standard poller that does node, interface and volume polling. We are doing this in a phased transition, so for 10.1 both exist. However, for volumes which are now being polled via this new collector we should see some improvements.
If you could post some more info about your loaded poller and we can talk from there.
Here is a snapshot of the physical stats and polling stats for our one poller that is having issues:
HP DL580, Win2003 Server, Enterprise x64 SP2, Intel Xeon CPU @ 3.20GHz, 12GB of RAM
Network Node Elements 555
Interface Elements 2673
Volume Elements 97
Date Time 1/3/2011 10:41:52 AM
ICMP Status Polling Index 3325 out of 3325
SNMP Status Polling Index 3325 out of 3325
ICMP Status Polls per second 0
SNMP Status Polls per second 0
Max Status Polls Per Second 40
DNS Outstanding 0
ICMP Outstanding 20
SNMP Outstanding 1
ICMP Statistic Polling Index 5990 out of 5990
SNMP Statistic Polling Index 5990 out of 5990
ICMP Statistic Polls per second 10
SNMP Statistic Polls per second 0.5
Max Statistic Polls Per Second 26
The poller is currently a dual processor, but we have the option of going quad?
Any advice prior to us going to 10.1.1 is greatly appreciated.