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Agent threads consume more than half of nproc; Resource temporarily unavailable

edited Jun 11, 2015 12:34PM in Enterprise Manager Generic (MOSC) 2 commentsAnswered

Hi, DBAs

This is a four node cluster on Red Hat; redhat-release-5Server-5.6.0.3.x86_64.  It is monitored by 12.1.0.3 agents.  Clusterware is 11.2.0.4.  User oracle owns all the software:  GI, databases and agent.  Yesterday, another DBA reported she could not connect to one of the nodes as oracle.  The error was "su: cannot set user id: Resource temporarily unavailable".  The other three nodes were accessible, but we could not ssh as oracle to the fourth node, either.  However, I was able to  connect  to the node with my personal credentials.

A Community post suggested that a too-low soft value for nproc was responsible.  Sure enough, a count of all threads owned by oracle on the node was 2189.  This is greater than 2047, the soft value of nproc in /etc/system/limits.conf.   This value for nproc is from the installation guide for Grid Infrastructure, the same value is in the Enterprise Manager 12.1.0.3 installation guide.

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