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and fsync WAL at convenient intervals. For the moment it just tries to offload this work from backends, but soon it will be responsible for guaranteeing a maximum delay before asynchronously-committed transactions will be flushed to disk. This is a portion of Simon Riggs' async-commit patch, committed to CVS separately because a background WAL writer seems like it might be a good idea independently of the async-commit feature. I rebased walwriter.c on bgwriter.c because it seemed like a more appropriate way of handling signals; while the startup/shutdown logic in postmaster.c is more like autovac because we want walwriter to quit before we start the shutdown checkpoint.
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* bootstrap.h
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* include file for the bootstrapping code
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*
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*
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* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/bootstrap/bootstrap.h,v 1.47 2007/07/24 04:54:09 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef BOOTSTRAP_H
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#define BOOTSTRAP_H
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#include "nodes/execnodes.h"
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/*
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* MAXATTR is the maximum number of attributes in a relation supported
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* at bootstrap time (i.e., the max possible in a system table).
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*/
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#define MAXATTR 40
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typedef struct hashnode
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{
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int strnum; /* Index into string table */
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struct hashnode *next;
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} hashnode;
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extern Relation boot_reldesc;
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extern Form_pg_attribute attrtypes[MAXATTR];
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extern int numattr;
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extern void AuxiliaryProcessMain(int argc, char *argv[]);
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extern void index_register(Oid heap, Oid ind, IndexInfo *indexInfo);
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extern void err_out(void);
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extern void InsertOneTuple(Oid objectid);
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extern void closerel(char *name);
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extern void boot_openrel(char *name);
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extern char *LexIDStr(int ident_num);
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extern void DefineAttr(char *name, char *type, int attnum);
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extern void InsertOneValue(char *value, int i);
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extern void InsertOneNull(int i);
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extern char *MapArrayTypeName(char *s);
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extern char *CleanUpStr(char *s);
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extern int EnterString(char *str);
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extern void build_indices(void);
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extern void boot_get_type_io_data(Oid typid,
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int16 *typlen,
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bool *typbyval,
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char *typalign,
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char *typdelim,
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Oid *typioparam,
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Oid *typinput,
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Oid *typoutput);
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extern int boot_yyparse(void);
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extern int boot_yylex(void);
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extern void boot_yyerror(const char *str);
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typedef enum
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{
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CheckerProcess,
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BootstrapProcess,
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StartupProcess,
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BgWriterProcess,
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WalWriterProcess
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} AuxProcType;
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#endif /* BOOTSTRAP_H */
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