256 posts categorized "Application Performance" Feed

Palo Alto Packet Latency Case Study Using Workbench and Wireshark (by Paul Offord)

Analyzing packets at two points provides an accurate way to determine the delays across a network.  The team at Advance7 used this technique to find the cause of performance and stability problems with a web application.  The system topology was complex, but very common in today's enterprise environments; users accessing systems using a Windows terminal and ESX VDI-delivered desktops.

  Rtt_to_ack

Users reported slow response times and intermittent disconnects.  The path through the network from VDI host to application server was 10 GbE all the way, and so link overload was unlikely.  There were various theories about the cause of the problem but solid evidence was needed.

In this video ...

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LMTV LIVE | Advanced Performance and Security Real-time Analysis (Extrahop)

 


YouTube LIVE start time: 9:30 AM PST, Wednesday, September 20, 2017


Extrahop_logo With 7.0, ExtraHop introduces live activity maps for complete 3D interaction with the hybrid IT environment; enhanced threat anomalies and machine learning-initiated workflows for performance and security; and perfect forward secrecy (PFS) decryption at scale to support next-generation security architectures.


Give Me Packets!!! Case Study: Slow Oracle DB (by Mike Canney)

There are a number of tools on the market that claim to allow you to analyze Data Bases.  I have many customers that own these tools and sometimes they work great.  Especially if it's what I call a "Low Hanging Fruit" problem, such as a slow SQL call like a SELECT or INSERT etc.  

What happens when it's not so obvious?  This is where deep packet analysis is needed.  In the following case study we will look at a chronic problem that far too many of my customers experience and how to quickly resolve that issue.  This particular problem was lasting for months.  More memory was added, servers upgraded, content switches added/upgraded yet the problem still persisted.  

 Let's take a look:

 

  

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LMTV LIVE | Application-Centric Infrastructure Monitoring and Analytics (Uila, Inc.)



YouTube LIVE start time: 9:30 AM PST, Wednesday, August 30, 2017


LogoPlease join us this week with representatives from Uila, Inc., to learn about their Application-centric Infrastructure Monitoring and Analytics solution and how it can help IT teams:

• Make applications or business services & the Infrastructure underneath it, run well

• Solve their toughest problems, both known and unknown

• Focus on innovative IT initiatives vs just working to keep the lights on or fighting fires

• Strategize their support for the new business accelerations with the deep knowledge of the existing environment


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The Dark Side of Packet Slicing (by Mike Canney)

SiegerninjaPF

 

Packet or frame slicing our captures can be a great way to hide information in trace files if done correctly.  However, you have to really understand the reason for the captures in the first place.  For example, often times application performance issues leave many clues at layer 4 (specifically TCP).  What happens when you 'hard" slice a trace file and now cannot follow the TCP sequence numbers because the incorrect frame size value is written in the pcap file?

Other times you may need to see the specific application call (SQL/Oracle) to actually fix the problem but you no longer have that data because you've sliced it away.  

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LMTV LIVE | Distributed Network Monitoring with Raspberry Pi (with Panos Vouzis of NetBeez)



YouTube LIVE start time: Wednesday, August 9, 2017 - 9: 30 AM (PST)


Netbeez Single-board computers, like the Raspberry Pi or Odriod, are getting widespread adoption within the network engineering community thanks to their computational power (approximately 1 GHz) and low cost (less than $50 per unit). As a result, more and more companies are deploying these devices within their enterprise networks and using them as monitoring sensors to collect analytics on network performance, wireless networks, and cloud services.

Panos Vouzis is a cofounder of NetBeez which provides network performance monitoring designed for network managers primarily interested in early fault detection and quick troubleshooting of complex wide area networks.


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