?
Solved

Exchange 2010 - Online Mode Issues

Posted on 2014-11-03
3
Medium Priority
?
61 Views
Last Modified: 2015-03-07
We are occasionally having client freeze ups in online mode and delays when sending (it sits there for several seconds). There RPC dialog notifications occasionally on the client as well. We have 10 database servers (some are DR DAG servers), 5 CAS/HT servers and 1 dedicated HT server. We have 4 servers in a hardware LB CAS array. We also have 2 DC's in the same site. These are all VM's.

We are moving to a shared desktop (citrix) non-VDI (not by choice) environment that requires online mode for the clients. Previously in cached mode there were no noticeable issues.

I've run the exchange troubleshooter repeatedly and it doesn't really appear there are too many highly active users. 6 users at any given time can account for 30% of the MAPI CPU utilization but everything appears to be healthy. Occasionally our DC's have high CPU utilization but that seemed to be due to LDAP lookups which I offloaded to another dedicated DC in another site. We do have BES but I have that going to a specific CAS server in our DR site.

I'm monitoring the servers in Solarwinds APM and not seeing anything that's out of spec other than our DAG's being behind in log files during the day.

Help me!
0
Comment
Question by:vpetersen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 7

Expert Comment

by:mbkitmgr
ID: 40420489
I had a similar situation in our ESX environment.  In my case it was DNS lookups were being delayed, as they were being handled by the ADC, which in turn was affecting OLK in the same way.  (all where on the same Host)

In the end I added more resources to the ADC and it was happy after that.

Your environment sounds much more upscale than mine, but if it helps....
0
 
LVL 1

Accepted Solution

by:
vpetersen earned 0 total points
ID: 40429133
So far it seems like it was an issue with our load balancers timeout settings.
0
 
LVL 1

Author Closing Comment

by:vpetersen
ID: 40650705
Self resolved
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article lists the top 5 free OST to PST Converter Tools. These tools save a lot of time for users when they want to convert OST to PST after their exchange server is no longer available or some other critical issue with exchange server or impor…
This article explains how to install and use the NTBackup utility that comes with Windows Server.
In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
Suggested Courses

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question