Comments on: Connections to DataBase Hang Including “/ as sysdba” http://askdba.org/weblog/2009/04/connections-to-database-hang-including-as-sysdba/ Writing About Our Experiences With Oracle Databases Mon, 19 Jul 2010 16:24:23 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Saurabh Sood http://askdba.org/weblog/2009/04/connections-to-database-hang-including-as-sysdba/comment-page-1/#comment-7694 Saurabh Sood Mon, 21 Dec 2009 08:50:32 +0000 http://askdba.org/weblog/?p=379#comment-7694 Hi Raj, Thanks for the input to this. Cheers!!! Saurabh Sood Hi Raj,

Thanks for the input to this.

Cheers!!!
Saurabh Sood

]]> By: Raj http://askdba.org/weblog/2009/04/connections-to-database-hang-including-as-sysdba/comment-page-1/#comment-7693 Raj Sat, 19 Dec 2009 05:41:46 +0000 http://askdba.org/weblog/?p=379#comment-7693 Good tip Sourabh!!! This would be handy. One more addition to it, you can trace the PID [pertaining to PL/SQL or whatever ]that is hanging the system by using any of the OS tracing tools like: i. systemtrap in linux ii.Dtrace in Solaris This would give you insight into the Oracle kernel code where it actually is during the hang. However, one should be cautious not to run OS tracing utilities which gets in the way of normal execution of the kernel code for the process that is being traced which might alter its state. For example, "pstack" in linux. ---Raj Good tip Sourabh!!! This would be handy.
One more addition to it, you can trace the PID [pertaining to PL/SQL or whatever ]that is hanging the system by using any of the OS tracing tools like:
i. systemtrap in linux
ii.Dtrace in Solaris
This would give you insight into the Oracle kernel code where it actually is during the hang.
However, one should be cautious not to run OS tracing utilities which gets in the way of normal execution of the kernel code for the process that is being traced which might alter its state.
For example, “pstack” in linux.
—Raj

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