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Force the TZ environment variable to be set during initdb. This is to

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short-circuit the rather expensive identify_system_timezone() procedure,
which we have no real need for during initdb since nothing done here depends
on the timezone setting.  Since we launch quite a few standalone backends
during the initdb sequence, this adds up to a significant savings, and seems
worth doing to save developer time even though it will hardly matter to end
users.  Per my report today on pgsql-hackers.
This commit is contained in:
Tom Lane 2009-12-18 18:45:50 +00:00
parent f5fd651e1b
commit be3a24de19
1 changed files with 9 additions and 1 deletions
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10
src/bin/initdb/initdb.c
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@ -42,7 +42,7 @@
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* Portions taken from FreeBSD. * Portions taken from FreeBSD.
* *
* $PostgreSQL: pgsql/src/bin/initdb/initdb.c,v 1.178 2009/12/11 03:34:56 itagaki Exp $ * $PostgreSQL: pgsql/src/bin/initdb/initdb.c,v 1.179 2009/12/18 18:45:50 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -2712,6 +2712,14 @@ main(int argc, char *argv[])
sprintf(pgdenv, "PGDATA=%s", pg_data); sprintf(pgdenv, "PGDATA=%s", pg_data);
putenv(pgdenv); putenv(pgdenv);
/*
* Also ensure that TZ is set, so that we don't waste time identifying the
* system timezone each of the many times we start a standalone backend.
* It's okay to use a hard-wired value here because nothing done during
* initdb cares about the timezone setting.
*/
putenv("TZ=GMT");
if ((ret = find_other_exec(argv[0], "postgres", PG_BACKEND_VERSIONSTR, if ((ret = find_other_exec(argv[0], "postgres", PG_BACKEND_VERSIONSTR,
backend_exec)) < 0) backend_exec)) < 0)
{ {