4 SharePoint Performance Check Tips

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Key Performance Sanity Checks
Andreas Grabner (@grabnerandi)
http://dynatrace.com/en/sharepoint

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Welcome to SharePoint Saturday Houston
• Please turn off all electronic devices or set them to vibrate
• If you must take a phone call, please do so in the hall so as not
to disturb others
• Special thanks to our Title Sponsor, ProSymmetry
Thank you for being a part of the
5th Annual SharePoint Saturday
for the greater Houston area!

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Thanks to all our Sponsors!

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Information
• Speaker presentation slides should be available
from the SPSHOU website within a week or so
• The Houston SharePoint User Group will be
having it’s next meeting Wednesday April 15th.
Please join us at www.h-spug.org

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That’s why I ended up talking at HSPS

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4

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What are these 4 Ideas?
1. 7 Steps to check SharePoint Health
2. Avoid common Deployment Mistakes
3. Analyze SharePoint Usage
4. Which Pages are Slow and Why?
Bonus: Real Life Troubleshooting Example

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7 Step SharePoint Health Check
#1: End User Health #3: System Health#2: Site Health
#4: IIS Health #5: AppPool Health #6: SQL & Service Health
#7: Web Parts

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Check #1: End User Health
#1: Geo Location
#2: User
Environment
#3: Errors

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Check #2: Site Health
#1: Load #2: Failures
#3:
Performance
#4:
Infrastructure
#5: End User
Index

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Check #3: System Host Health
#1: CPU & Memory
#3: Process Check: Need to
RE-DEPLOY?
#2: I/O: Static & Logs

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Check #4: IIS Health
#1: Threads
#2: Throughput
#3: Page Size

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Check #5: AppPool Health
#1: Memory #2: Garbage Collection
#3: Worker Threads

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Check #6: SQL & Service Health
#2: Connectivity Issues
#1: Excessive SQL Roundtrips

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Check #7: Web Parts
#1: Performance #2: Deployment
#3: Bad Coding: 211 SQL!

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AVOID COMMON DEPLOYMENT MISTAKES
Connectivity, Missing Files, Permission, …

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Who’s talking with whom?
How many Web Sites are
actually running?
How many requests make it
to SharePoint’s AppPool?
Do we call any external
services
Is our SQL Server
overloaded?

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Any Deployment Mistakes? HTTP 5xx, 4xx?
Which errors are thrown by which page?
Which Errors impact
how many users?

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Any Bad WebPart?
WebParts that can’t
be loaded!
Here is the page that
uses this WebPart

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Connectivity Issues between Services?
Watch out for Connection
Exceptions!
This is the page that
tries to connect to
that backend service!
Root Cause:
Configuration Issue

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Authentication Issues?
How many users have
authentication issues?
Which pages are users
trying to access?

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User Permission Problems?
#1: Permission Issue Detected!
#2: Related to
SocialNavigationControl
#3: Here is the
problematic page

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Missing Lists?
List not found Exception!
Here is the page that
references this list!

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Missing Columns?
Somebody deleted a
column?
Here is the page that
shows that column!

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Bad Filter Settings?
Bad filter settings
result in Exceptions
Here is the page that
uses that bad filter!

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ANALYZE SHAREPOINT USAGE
Who is using What, How from Where?

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How are people navigating through SharePoint?
Which browsers do
people use?
Where are they from?
Which Office?
How do they navigate
through the site?
How fast/slow are
these pages for
them?
Maybe impacted by
bad network
connectivity?

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Which Lists/Views are Used?
How often used? How fast/slow? Time spent in SQL Server?
Same information
interesting per View
High Failure Rate?

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Which Web Parts are used?

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WHICH PAGES ARE SLOW
How to identify them?

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What are the top slowest end user pages?
How Fast/Slow for
the end user?
How much of that
is Server Time?

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What makes them slow?
How do these
pages load?
Lots of JavaScript that
loads slow? Maybe
cache on a Proxy/CDN?

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REASONS FOR SLOW PAGES
Client and Server Side

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Many reasons for bad performance
• Frontend
– Overloaded and complex Pages
– Too much JavaScript slows down older browsers
– Bad content caching
• Backend
– Bad/Too Much Database Access
– Bad Coding of custom code
– Overhead due to configuration issues and resulting logs/exceptions
– High Memory Consumption
– Wrong Deployment Configurations (e.g: worker threads, …)

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Overloaded Pages
2.6MB for Home Page !
Don’t overload with too
much information!

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Database Impact: too many requests
211! SQLs per
Page Request

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Database Impact: Same SQLSame SQL called many
times per page!

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Database Impact: Whom to blame?
• Overloaded Pages with too many Web Parts
• Badly implemented custom web parts
• 3rd party WebParts or Controls

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Bad Coding of Custom Web Parts - #1
ALL List Items are retrieved from the Database
DO NOT
int noOfItems = SPContext.Current.List.Items.Count;
Item Count is kept redundant in the AllUserData table and also kept in memory
DO
int noOfItems = SPContext.Current.List.ItemCount;

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Bad Coding of Custom Web Parts - #2
DO NOT
for (int itemIx=0;itemIx< SPContext.Current.List.Items.Count;itemIx++) {
SPListItem listItem = SPContext.Current.List.Items[itemIx];
// do something ...
}
Every access to Count and Items Property queries the whole SharePoint list
We end up with 202 SQL Executions with a total exec time of > 1s

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Good Coding of Custom Web Parts - #2
DO
SPListItemCollection items = SPContext.Current.List.Items;
foreach (SPListItem listItem in items) {
// do something ...
}
Only first access to the collection queries the data

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Telerik Grid Control Going Wild
#1: Data Driven Problem
Depending on the user input
on that request we see up to
493! SQL Calls per request
Root Cause: Every Grid Cell
executed a new SQL
#2: Statements not prepared
None of these executions has
been prepared

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High Garbage Collection
Memory Heavy Apps
result in High GC that
impacts Performance

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High GC Result of High Memory Usage!
Long Running GCs!
Analyze Memory
Patterns

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High GC: Performance Heap Analysis
Which classes stay
on the heap?
Which have the
biggest impact?
Who is keeping
them in memory?

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REAL LIFE TROUBLESHOOTING
The journey of a frustrated SharePoint User

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Frustrated User report bad Response Times
Frustrated User
Slow Page Load caused by Browser JS Time
Slow Page Load caused by Server-Side Processing

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Really slow page
6.8s to deliver Default.aspx page
Involved Web Parts
Most of the Time spent
In waiting

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WebPart uses multiple parallel Threads
Async Threads are busy with I/O

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First Remote Call is Very Slow
Web Service call by ContentEditorWebPart
HttpWebRequests uses ServicePoint internally
First Web Serivce Requests takes 5.8s to return

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Thread Limit lets all other Threads wait!
We have 10 parallel calls in our background threads
The other background threads spend their time
“waiting” in the ServicePoint

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Solution: Change Defaults

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Key Points to Take Home
#1: End User Health: Happy or
Frustrated? Desktop or Mobile?
#3: System Health: CPU, Memory,
Process Distribution, …
#2: Site Health: Any Errors? Any
Performance Issues?
#4: IIS Health: Bandwidth?
Threads? HTTP 4xx, 5xx?
#5: AppPool Health: Memory,
CPU, GC, Exceptions, Logs …
#6: SQL & Service Health: # Roundtrips,
Data Amount, CPU, Memory, I/O
#7: Web Parts: 3rd Party &
Custom. Bad Coding and Bad
Deployments lead to crashes

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More Links for You
• Tools: http://dynatrace.com/en/sharepoint
• More Stories: http://blog.dynatrace.com/
• YouTube Tutorials: http://bit.ly/dttutorials
• Follow Me: @grabnerandi
• Contact Me: agrabner@dynatrace.com

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