PI48017: DURING EXTREMELY HIGH NETWORK THROUGHPUT DEMANDS, MOBILEFIRST THROUGHPUT IS THROTTLED UNNECESSARILY BY ANALYTICS REPORTING.

IBM MobileFirst Platform Foundation Interim Fix README for 7.1

APAR status

• Closed as program error.

Error description

• When MobileFirst server is processing extremely frequent network
  requests, it is also attempting to report all of the analytics
  reports related to these requests.  The buffers for analytics
  reporting can fill, forcing the calling thread to process the
  analytics buffer flush, causing an unnecessary throttling of the
  original requests.  This appears as a major performance
  degredation to the overall server performance.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Customers with extremely high throughput demands on the      *
  * MobileFirst server may experience significant performance    *
  * degredation as the CPU approaches high percentage usage, and *
  * the network usage is close to saturation.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Internally, a Java threadpool is used to queue up and send   *
  * analytics data to the backend MobileFirst Analytics server.  *
  * This queue can become full.  At that point, the threadpool   *
  * policy was set to "caller runs", which was done in order to  *
  * best preserve analytics data, and as a mechanism to throttle *
  * the server.                                                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * -                                                            *
  ****************************************************************
  

Problem conclusion

• Since the MobileFirst server is more critical to business
  operations than the collection of Analytics data, the policy has
  been changed to "abort" so that when the queue is full, a
  warning is issued in the log, and some analytics data is
  dropped.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  MFPF/WORKLIGHT

• Fixed component ID

  5725I4301

Applicable component levels

• R710 PSY

     UP