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TTFB (Time To First Byte) – A metric to use with precaution

Definition
The TTFB (Time To First Byte) is a metric in network metrology. It is the time elapsed between the opening of a TCP connection between a client and a server, and receipt by the client of a first packet with payload from the server.

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Time To First Byte (simplified)

 

A common measure

The TTFB is a common measure in metrology, this for two reasons.

The first is that it covers a number of possible causes of performance problems. As shown in the diagram above, the TTFB contains a part of…

Performance impact of encryption: a case study!

Is the treatment you execute on a flow neutral from a performance point of view?
Well… it depends how fast it is performed. If you have the article on the drivers of network latency (http://blog.securactive.net/?p=2857), you will probably see what we refer to. The processing job performed by network devices may not be neutral.

Here is a concrete example of a network connection which gets encrypted for security reasons. Here is what we could observe from a performance point …

APM: Taking IT monitoring beyond the limits of SNMP

SNMP Based monitoring is the starting point of an IT Service Management initiative
 

Polling data from critical devices has always been the basis for any IT monitoring system: it is the starting point for any monitoring systems. These platforms always provide a global view of all the critical devices in your IT system to control their availability and level of resource consumption.
Most traditional monitoring systems whether commercial software (e.g. BMC Patrol, HP IMC, ManageEngine OpsManager, Solarwinds NPM, Ipswitch What’s Up Gold, CastleRock SNMPc, CA Nimsoft) or open source (Nagios, Centreon, Cacti etc…) rely on a set of methods to control the …

Performance Vision

Securactive

Check our latest Infographic!

Using Performance Vision’s Open API

How to Interact with SPV
Power users of SPV often ask for interaction with SPV.

SPV can already provides useful data through SNMP for BCA and BCN, as explained in http://blog.securactive.net/?p=3358.  With SNMP you can also monitor the operating system of the probe, like the resource usage.

However how to request a custom page with filters from an other program? Starting with SPV 2.18 Securactive added a few useful features for developers to do so.
Send a link with embedded authentication
First of all, a simple feature, very basic for now, you can send a link with the embedded login and password. This is …

How to Capture Virtual Traffic with VMware VDS & Performance Vision

This short video shows how you can setup Virtual Distributed Switch of VMware and Performance Vision to visualize traffic & performance metrics between virtual machines.

If you have any further question, please visit http://forum.securactive.net and we shall provide you with additional information.

How to Activate the HTTP Performance Module?

The version 2.15 of Performance Vision offers the possibility to analyze HTTP performance.

Among other items, it allows you to display the behavior and performance of all the elements of a web page requested by a user.

Here is a timeline computed following a web request:

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How to activate it?
This activation can be done in 2 ways:

1/ By zone: you can activate the HTTP analysis on a whole zone (which can be defined by subnets, IP addresses, MAC addresses, VLAN… e.g.: a zone named “Web servers”)

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2/ …

Webinar – HTTP Application Performance Troubleshooting

HTTP applications concentrate many performance issues:

  • They are a common way to let internal & external users access and modify data.
  • They rely on a delivery chain which contains many elements, which are all performance drivers: browser, workstation, network, front-server, application server, file server, database, images, etc…
  • They raise specific troubleshooting issues: among others, the end user feedback is based on the concept of page, while most network based performance analysis is based on every transaction / object in the page (html, css, image, script, etc.)

This one-hour webinar will enable you to:

  • Understand the challenges of performance troubleshooting for HTTP Applications.
  • View a …

Integrate Performance Vision with Nagios

Nagios is a powerful tool to easily monitor IT network and servers. It can alert on availability issue, software or hardware problems. But it’s much harder to alert on “End User Response Times” or response time degradation.

With the help of the SNMP module of your Securactive Performance Vision probes, you can add new check on Nagios to perform this and other advanced checks.

You can find a step-by-step guide to integrate Performance Vision data into Nagios, here: http://www.securactive.net/help/userguide/nova/last/html/cacti.html?highlight=nagios#how-to-integrate-your-aps-with-nagios

SecurActive provides a Nagios script to make the integration easier; you can find it here: https://github.com/securactive/check_snmp_securactive or http://download.securactive.net/misc/check_snmp_securactive.pl.zip

Integration of WhatsUp Gold and Performance Vision

By integrating Performance Vision data into WhatsUp Gold, you can monitor network and application performance through the same solution as the availability and resource consumption of your IT infrastructure. Our distributor in Singapore, AsiaVAD, nicely drafted the new possibilities that this integration creates.

 

Ipswitch WhatsUp Gold is a popular network, server and application monitoring solution, support versatile monitor protocols such as SNMP, WMI, Service Running Check, Network Port, Scripting support, Disk/Memory Utilization Monitor, for wide range of devices include router, switches, firewall, servers of various OS, application servers.

SecurActive’s Performance Vision (SPV), is a network-based APM [Application Performance Monitoring] solution, …