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Keep track of the last active slot in the shared ProcState array, so

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that search loops only have to scan that far and not through all maxBackends
entries.  This eliminates a performance penalty for setting maxBackends
much higher than the average number of active backends.  Also, eliminate
no-longer-used 'backend tag' concept.  Remove setting of environment
variables at backend start (except for CYR_RECODE), since none of them
are being examined by the backend any longer.
This commit is contained in:
Tom Lane
2000-11-12 20:51:52 +00:00
parent c48025e799
commit ebb0a20149
10 changed files with 153 additions and 235 deletions
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3
src/include/miscadmin.h
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@ -12,7 +12,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: miscadmin.h,v 1.69 2000/11/04 12:43:24 petere Exp $
* $Id: miscadmin.h,v 1.70 2000/11/12 20:51:52 tgl Exp $
*
* NOTES
* some of the information in this file will be moved to
@ -55,7 +55,6 @@ extern char OutputFileName[];
* done in storage/backendid.h for now.
*
* extern BackendId MyBackendId;
* extern BackendTag MyBackendTag;
*/
extern bool MyDatabaseIdIsInitialized;
extern Oid MyDatabaseId;