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Genesys Pulse Hardware Sizing and Performance Information

This article describes the result of load testing performed using Genesys Pulse release 8.5.101 and serves as a guideline for Genesys Pulse capacity and resource usage. For a production deployment, you must test Genesys Pulse in your own environment under a production load to ensure its performance meets your expectations and is sized properly.

Architecture Example

Pulse851GenericArchitecture.png

  1. Each Genesys Pulse Collector can handle about 300K statistics with a 10-second refresh rate.
  2. Collector adjusts the load based on the refresh rate.
Important
If you use change-based notifications for anything other than Agent Current State, you might have a significant number of notifications for each of these statistics per second. You must configure sensitivity appropriately and account for these additional notifications in sizing.
  1. If you use Genesys Pulse Collector Cluster configuration, the statistics are dynamically distributed across the Collectors in the cluster.
  2. Genesys recommends you have a dedicated Stat Server for each Genesys Pulse Collector. If you to have multiple Collectors for each Stat Server, contact Customer Care to evaluate your solution.
  3. Each Genesys Pulse Collector supports only a single connection to Stat Server (HA pair). All Stat Servers used for all Collectors in a cluster must be connected to the same sources (for example, T-Servers, SIP-servers, IXN-servers).
  4. Each Genesys Pulse plug-in can render the statistics and views across all Genesys Pulse Collectors in a cluster.
  5. You can have multiple Genesys Pulse Collectors for each GAX.
  6. Determine the number of GAX instances depending on number of concurrent users and numbers of Collectors depending on number of Stat Request notifications per second.
  7. For High Availability environments, you need a pair of Genesys Pulse Collectors to present a node.
  8. Genesys Pulse components (GAX, Genesys Pulse plug-in, Genesys Pulse Collector, Stat Server, DB Server) are operational in Site 1 (primary region) and Site 2 (failover region).
  9. The GAX and Genesys Pulse User Interface is normally accessed only in Site 1.
  10. Genesys Pulse in Site 2 can provide reports, but users only connect to the Site 2 if the failover from Site 2 is initiated.
  11. GAX and Genesys Pulse databases are replicated from Site 1 to Site 2 through a periodic backup and restore process.
  12. WebDav is used when GAX needs to pull snapshot data from Genesys Pulse Collector that is not installed on the local (same) host. Genesys supports lighthttpd http server with lighttpd-mod-webdav.

Which Collector handles which requests? Collectors are grouped into active-active HA pairs so Genesys Pulse Node 1 Collectors always process the same requests (for example, each subscribes to same statistics). Similarly, Genesys Pulse Node 2 Collectors process the same stats.

Which widget uses which node? They function as a round robin of widget distribution - basically, half the widgets go to Node 1 and half go to Node 2.

All Stat Servers are configured in HA pairs and they work in active-active mode. For example, the backup Stat Server calculates statistics the same way as Primary.

Both Collectors from the same node are connected to both Stat Servers from this node in terms in TCP connections. However, configured them in Configuration Server with VM1 SS as Primary and VM2 SS as backup. Then both Collectors on VM1 and on VM2 are connected to Primary SS (which is VM1 SS), so there is only one connection. When Collector starts it sees that it is connected to Primary VM1 SS that has a backup configured and then it connects to backup automatically.

Environment Configuration

2 nodes Amazon AWS:

  vCPU ECU Memory (GiB) Instance Storage (GB)
c3.8xlarge 32 108 60 2 x 320 SSD

Each node has cluster of 3 Genesys Pulse Collectors, 3 Stat Servers and 1 GAX instance

Collectors and Stat Servers are connected to each other in HA mode (1 Genesys Pulse Collector on each node is connected to Stat Server on same node and StatServer on another node).

Key performance impacting dimensions of the environment:

Widget and Statistic notification rate: 10sec

Important

Change based statistics (and quick updates feature of Genesys Pulse) are not used.
If you use change based statistics in your configuration (and they are not Agent State statistics) make sure you set sensitivity such that Stat Server sends notifications no more often than once a second.
Amount of Stat Server notifications with change based statistics can be unpredictable and be an order of magnitude greater than with time based so they must be carefully tuned (using sensitivity) and tested

Number of layouts (widgets) = 2400

Total Number of Statistics Requests to Stat Servers = Sum of (Number of Objects * Number of Stat) across all widgets = 1,740,000 (1.7M)
As result we get 1.7M notifications from Stat Servers every 10 seconds so 170K updates per second.

Genesys Pulse DB size is 31260672 bytes for ~ 2500 layouts so 12.5Kbytes per layout (widget)

 

This load was split between 3 Genesys Pulse Collectors/Stat Server pairs (in cluster)

Each Genesys Pulse Collector in cluster processed 800 layouts and consumed following:

  • Memory (about 2K per statistic for 64bit version): up to 5GB
  • CPU up to 800% (this means 8 cores)
  • Bandwidth: ~1GBit/s between Genesys Pulse Collector and Stat Server (on the other node)
Important

Because Collector queues the messages that come from Stat Server the memory consumption above is achieved when there is no backlog - i.e Collector is able to process all layouts and save them as it gets the data.

If Genesys Pulse Collector cannot process all Stat Server messages it receives, it expands its memory size (use statistic-request-handling/max-stat-data-queue-size option to control it)

 

GAX resource consumption:

  • Memory usage 9MB per logged in user session
  • CPU usage peaks at 800% (8 cores)
  • User with 5 widgets with refresh rate 10 sec (total sum of number of statisic * number of object in these widgets is 5781) receives about 600KB per minute (so average traffic is about 80Kbit/s).
  • 1 GAX instance handled 200-300 concurrent users

Dashboard Configuration

For the best experience Genesys recommends not to exceed the following number of Grid widgets per dashboard:

Browser Number of grid widgets
Google Chrome 6
Mozilla Firefox 6
Microsoft Internet Explorer 11 3
Microsoft Edge 6

with the total number of displayed grid columns <= 30 per dashboard.

Measurements were performed using the following client configuration:

  • (VM) Client 1:
    • Windows 7 Professional 64-bit RAM 6.00 GB, intel Xeon (R) CPU E7-4850 @ 2.00 GHz
    • Screen resolution: 1920x1080
    • Total video memory: 32 MB
    • Browsers: Internet Explorer 11, Chrome 60.0.8112.90, Firefox 55.0.2
  • (VM) Client 2:
    • Windows 10 Professional 32-bit, 5.95 GB, intel Xeon (R) CPU E7-4850 @ 2.00 GHz
    • Screen resolution: 1920x1080
    • Total video memory: 32 MB
    • Browsers: Microsoft Edge 40.15063.0.0

This page was last modified on April 26, 2018, at 20:56.

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