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49340037ee
Latch-ify the stats collector, so that it does not need an arbitrary wakeup cycle to check for postmaster death. The incremental savings in idle power is pretty marginal, since we only had it waking every two seconds; but I believe that this patch may also improve the collector's performance under load, by reducing the number of kernel calls made per message when messages are arriving constantly (we now avoid a select/poll call except when we need to sleep). The change also reduces the time needed for a normal database shutdown on platforms where signals don't interrupt select().
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.