Probing Database Applications with DTrace

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01-14-2010

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Probing Database Applications with DTrace

Embedded probes have several advantages, and this session explains what they are and shows how to add probes to applications and use them to solve performance problems, with a case study from the MySQL database and PostgreSQL.

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LEARN ABOUT OPENSOLARIS

lockstat

lockstat(7D)							      Devices							      lockstat(7D)

NAME

       lockstat - DTrace kernel lock instrumentation provider

DESCRIPTION

       The  lockstat  driver is a DTrace dynamic tracing provider that performs dynamic instrumentation for locking primitives in the Solaris ker-
       nel.

       The lockstat provider makes probes available that you can use to discern lock contention statistics, or to understand virtually any  aspect
       of locking behavior inside the operating system kernel. The lockstat(1M) command is implemented as a DTrace consumer that uses the lockstat
       provider to gather raw data.

       The lockstat driver is not a public interface and you access the instrumentation offered by this provider  through  DTrace.  Refer  to  the
       Solaris	Dynamic  Tracing  Guide  for  a  description  of the public documented interfaces available for the DTrace facility and the probes
       offered by the lockstat provider.

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWdtrp			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Private			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dtrace(1M), lockstat(1M), attributes(5), dtrace(7D)

       Solaris Dynamic Tracing Guide

SunOS 5.11							    3 Sep 2003							      lockstat(7D)

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