Skip to main content
NetApp Knowledge Base

OnCommand Unified Manager's web interface becomes slow/unresponsive

Last Updated:

Applies to

  • OnCommand Unified Manager (OCUM) 9.5 and below
  • ActiveIQ Unified Manager (AIQUM) 9.6 and above


  • The OnCommand Unified Manager web interface becomes stale, unresponsive, and stops collecting data from its monitored Clusters
  • Events/alerts are not triggered because the server is barely functioning
  • After rebooting the Virtual Machine instance of OnCommand Unified Manager (vApp), functionality resumes for a relatively short period of time until responsiveness slows down and it needs to be rebooted again
  • In some occasions the AIQUM services may not start at all after a reboot

In Support Bundle's 'jboss' folder, review the 'au_error###.log" file for the following content:

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (mmap) failed to map 12288 bytes for committing reserved memory.

# Possible reasons:

# The system is out of physical RAM or swap space

# In 32 bit mode, the process size limit was hit

# Possible solutions: Knowledgebase

# Reduce memory load on the system

# Increase physical memory or swap space

# Check if swap backing store is full

# Use 64 bit Java on a 64 bit OS

# Decrease Java heap size (-Xmx/-Xms)

# Decrease number of Java threads

# Decrease Java thread stack sizes (-Xss)

# Set larger code cache with -XX:ReservedCodeCacheSize=

# This output file may be truncated or incomplete.

# # Out of Memory Error (os_linux.cpp:2643), pid=6920, tid=0x00007f30c27e9700



Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.