Continued rearrangement to permit pgstat + BootstrapMain processes to be
fork/exec'd, in the same mode as the previous patch for backends. Claudio Natoli
This commit is contained in:
Bruce Momjian
parent
3e32e9476f
commit
aeddc2a60d
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@ -8,7 +8,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.171 2003/12/20 17:31:21 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.172 2003/12/25 03:52:50 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -48,6 +48,11 @@
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#define ALLOC(t, c) ((t *) calloc((unsigned)(c), sizeof(t)))
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#ifdef EXEC_BACKEND
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typedef struct Port Port;
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extern void SSDataBaseInit(int);
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extern void read_backend_variables(pid_t, Port*);
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#endif
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extern int Int_yyparse(void);
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static hashnode *AddStr(char *str, int strlength, int mderef);
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@ -238,7 +243,7 @@ BootstrapMain(int argc, char *argv[])
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*
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* If we are running under the postmaster, this is done already.
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*/
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if (!IsUnderPostmaster /* when exec || ExecBackend */ )
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if (!IsUnderPostmaster || ExecBackend)
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MemoryContextInit();
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/*
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@ -247,7 +252,7 @@ BootstrapMain(int argc, char *argv[])
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/* Set defaults, to be overriden by explicit options below */
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dbname = NULL;
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if (!IsUnderPostmaster /* when exec || ExecBackend */ )
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if (!IsUnderPostmaster)
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{
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InitializeGUCOptions();
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potential_DataDir = getenv("PGDATA"); /* Null if no PGDATA
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@ -285,24 +290,11 @@ BootstrapMain(int argc, char *argv[])
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xlogop = atoi(optarg);
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break;
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case 'p':
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{
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/* indicates fork from postmaster */
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#ifdef EXEC_BACKEND
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char *p;
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sscanf(optarg, "%lu,%p,",
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&UsedShmemSegID,
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&UsedShmemSegAddr);
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p = strchr(optarg, ',');
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if (p)
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p = strchr(p + 1, ',');
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if (p)
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dbname = strdup(p + 1);
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#else
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dbname = strdup(optarg);
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IsUnderPostmaster = true;
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#endif
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dbname = strdup(optarg);
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break;
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}
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case 'B':
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SetConfigOption("shared_buffers", optarg, PGC_POSTMASTER, PGC_S_ARGV);
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break;
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@ -347,12 +339,7 @@ BootstrapMain(int argc, char *argv[])
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if (!dbname || argc != optind)
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usage();
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#ifdef EXEC_BACKEND
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if (IsUnderPostmaster && MyProc /* ordinary backend */ )
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AttachSharedMemoryAndSemaphores();
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#endif
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if (!IsUnderPostmaster /* when exec || ExecBackend */ )
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if (!IsUnderPostmaster || ExecBackend)
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{
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if (!potential_DataDir)
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{
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@ -376,6 +363,9 @@ BootstrapMain(int argc, char *argv[])
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{
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#ifdef EXEC_BACKEND
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read_nondefault_variables();
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read_backend_variables(getpid(),NULL);
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SSDataBaseInit(xlogop);
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#endif
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}
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else
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@ -427,6 +417,10 @@ BootstrapMain(int argc, char *argv[])
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SetProcessingMode(BootstrapProcessing);
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IgnoreSystemIndexes(true);
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#ifdef EXEC_BACKEND
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if (IsUnderPostmaster)
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AttachSharedMemoryAndSemaphores();
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#endif
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XLOGPathInit();
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BaseInit();
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@ -13,7 +13,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/main/main.c,v 1.68 2003/12/23 00:34:04 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/main/main.c,v 1.69 2003/12/25 03:52:50 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -39,6 +39,7 @@
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#include "tcop/tcopprot.h"
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#include "utils/help_config.h"
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#include "utils/ps_status.h"
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#include "pgstat.h"
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@ -202,9 +203,9 @@ main(int argc, char *argv[])
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/*
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* Now dispatch to one of PostmasterMain, PostgresMain, GucInfoMain,
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* or BootstrapMain depending on the program name (and possibly first
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* argument) we were called with. The lack of consistency here is
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* historical.
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* pgstat_main, pgstat_mainChild or BootstrapMain depending on the
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* program name (and possibly first argument) we were called with.
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* The lack of consistency here is historical.
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*/
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len = strlen(new_argv[0]);
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@ -221,6 +222,28 @@ main(int argc, char *argv[])
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if (argc > 1 && strcmp(new_argv[1], "-boot") == 0)
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exit(BootstrapMain(argc - 1, new_argv + 1));
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#ifdef EXEC_BACKEND
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/*
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* If the first argument is "-statBuf", then invoke pgstat_main. Note
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* we remove "-statBuf" from the arguments passed on to pgstat_main.
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*/
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if (argc > 1 && strcmp(new_argv[1], "-statBuf") == 0)
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{
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pgstat_main(argc - 2, new_argv + 2);
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exit(0);
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}
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/*
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* If the first argument is "-statCol", then invoke pgstat_mainChild. Note
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* we remove "-statCol" from the arguments passed on to pgstat_mainChild.
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*/
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if (argc > 1 && strcmp(new_argv[1], "-statCol") == 0)
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{
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pgstat_mainChild(argc - 2, new_argv + 2);
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exit(0);
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}
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#endif
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/*
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* If the first argument is "--describe-config", then invoke runtime
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* configuration option display mode.
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@ -13,7 +13,7 @@
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*
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* Copyright (c) 2001-2003, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.49 2003/12/20 17:31:21 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.50 2003/12/25 03:52:51 momjian Exp $
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* ----------
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*/
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#include "postgres.h"
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@ -106,7 +106,13 @@ static char pgStat_fname[MAXPGPATH];
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* Local function forward declarations
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* ----------
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*/
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static void pgstat_main(void);
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#ifdef EXEC_BACKEND
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static void pgstat_exec(STATS_PROCESS_TYPE procType);
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static void pgstat_parseArgs(PGSTAT_FORK_ARGS);
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#endif
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NON_EXEC_STATIC void pgstat_main(PGSTAT_FORK_ARGS);
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NON_EXEC_STATIC void pgstat_mainChild(PGSTAT_FORK_ARGS);
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static void pgstat_mainInit(void);
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static void pgstat_recvbuffer(void);
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static void pgstat_die(SIGNAL_ARGS);
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@ -328,6 +334,89 @@ startup_failed:
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}
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#ifdef EXEC_BACKEND
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/* ----------
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* pgstat_exec() -
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*
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* Used to format up the arglist for, and exec, statistics
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* (buffer and collector) processes
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*
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*/
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static void
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pgstat_exec(STATS_PROCESS_TYPE procType)
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{
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char *av[11];
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int ac = 0, bufc = 0, i;
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char pgstatBuf[8][MAXPGPATH];
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av[ac++] = "postgres";
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switch (procType)
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{
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case STAT_PROC_BUFFER:
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av[ac++] = "-statBuf";
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break;
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case STAT_PROC_COLLECTOR:
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av[ac++] = "-statCol";
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break;
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default:
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Assert(false);
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}
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/* Sockets + pipes */
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bufc = 0;
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%d",pgStatSock);
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%d",pgStatPmPipe[0]);
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%d",pgStatPmPipe[1]);
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%d",pgStatPipe[0]);
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%d",pgStatPipe[1]);
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/* + the pstat file names, and postgres pathname */
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/* FIXME: [fork/exec] whitespaces in directories? */
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%s",pgStat_tmpfname);
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%s",pgStat_fname);
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snprintf(pgstatBuf[bufc++],MAXPGPATH,"%s",pg_pathname);
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/* Add to the arg list */
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Assert(bufc <= lengthof(pgstatBuf));
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for (i = 0; i < bufc; i++)
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av[ac++] = pgstatBuf[i];
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av[ac++] = NULL;
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Assert(ac <= lengthof(av));
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if (execv(pg_pathname,av) == -1)
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/* FIXME: [fork/exec] suggestions for what to do here? Can't call elog... */
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Assert(false);
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}
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/* ----------
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* pgstat_parseArgs() -
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*
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* Used to unformat the arglist for exec'ed statistics
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* (buffer and collector) processes
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*
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*/
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static void
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pgstat_parseArgs(PGSTAT_FORK_ARGS)
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{
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Assert(argc == 8);
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argc = 0;
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pgStatSock = atoi(argv[argc++]);
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pgStatPmPipe[0] = atoi(argv[argc++]);
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pgStatPmPipe[1] = atoi(argv[argc++]);
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pgStatPipe[0] = atoi(argv[argc++]);
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pgStatPipe[1] = atoi(argv[argc++]);
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strncpy(pgStat_tmpfname,argv[argc++],MAXPGPATH);
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strncpy(pgStat_fname, argv[argc++],MAXPGPATH);
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strncpy(pg_pathname, argv[argc++],MAXPGPATH);
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}
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#endif
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/* ----------
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* pgstat_start() -
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*
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@ -416,22 +505,17 @@ pgstat_start(void)
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beos_backend_startup();
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#endif
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IsUnderPostmaster = true; /* we are a postmaster subprocess now */
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MyProcPid = getpid(); /* reset MyProcPid */
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/* Lose the postmaster's on-exit routines */
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on_exit_reset();
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/* Close the postmaster's sockets, except for pgstat link */
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ClosePostmasterPorts(false);
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/* Drop our connection to postmaster's shared memory, as well */
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PGSharedMemoryDetach();
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#ifdef EXEC_BACKEND
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pgstat_exec(STAT_PROC_BUFFER);
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#else
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pgstat_main();
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exit(0);
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#endif
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}
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@ -1228,35 +1312,15 @@ pgstat_send(void *msg, int len)
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*------------------------------------------------------------
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*/
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/* ----------
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* pgstat_main() -
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*
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* Start up the statistics collector itself. This is the body of the
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* postmaster child process.
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* ----------
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*/
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static void
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pgstat_main(void)
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pgstat_mainInit(void)
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{
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PgStat_Msg msg;
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fd_set rfds;
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int readPipe;
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int pmPipe = pgStatPmPipe[0];
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int maxfd;
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int nready;
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int len = 0;
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struct timeval timeout;
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struct timeval next_statwrite;
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bool need_statwrite;
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HASHCTL hash_ctl;
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IsUnderPostmaster = true; /* we are a postmaster subprocess now */
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/*
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* Close the writing end of the postmaster pipe, so we'll see it
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* closing when the postmaster terminates and can terminate as well.
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*/
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closesocket(pgStatPmPipe[1]);
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pgStatPmPipe[1] = -1;
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MyProcPid = getpid(); /* reset MyProcPid */
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/* Lose the postmaster's on-exit routines */
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on_exit_reset();
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/*
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* Ignore all signals usually bound to some action in the postmaster,
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@ -1275,6 +1339,31 @@ pgstat_main(void)
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pqsignal(SIGTTOU, SIG_DFL);
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pqsignal(SIGCONT, SIG_DFL);
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pqsignal(SIGWINCH, SIG_DFL);
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}
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/* ----------
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* pgstat_main() -
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*
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* Start up the statistics collector itself. This is the body of the
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* postmaster child process.
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* ----------
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*/
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NON_EXEC_STATIC void
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pgstat_main(PGSTAT_FORK_ARGS)
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{
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pgstat_mainInit(); /* Note: for *both* EXEC_BACKEND and regular cases */
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#ifdef EXEC_BACKEND
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pgstat_parseArgs(argc,argv);
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#endif
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/*
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* Close the writing end of the postmaster pipe, so we'll see it
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* closing when the postmaster terminates and can terminate as well.
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*/
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closesocket(pgStatPmPipe[1]);
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pgStatPmPipe[1] = -1;
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/*
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* Start a buffering process to read from the socket, so we have a
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@ -1305,9 +1394,12 @@ pgstat_main(void)
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case 0:
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/* child becomes collector process */
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closesocket(pgStatPipe[1]);
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closesocket(pgStatSock);
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break;
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#ifdef EXEC_BACKEND
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pgstat_exec(STAT_PROC_COLLECTOR);
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#else
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pgstat_mainChild();
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#endif
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exit(0);
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default:
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/* parent becomes buffer process */
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@ -1315,6 +1407,36 @@ pgstat_main(void)
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pgstat_recvbuffer();
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exit(0);
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}
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}
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NON_EXEC_STATIC void
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pgstat_mainChild(PGSTAT_FORK_ARGS)
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{
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PgStat_Msg msg;
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fd_set rfds;
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int readPipe;
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int pmPipe;
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int maxfd;
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int nready;
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int len = 0;
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struct timeval timeout;
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struct timeval next_statwrite;
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bool need_statwrite;
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HASHCTL hash_ctl;
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#ifdef EXEC_BACKEND
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MemoryContextInit(); /* before any elog'ing can occur */
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pgstat_mainInit();
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pgstat_parseArgs(argc,argv);
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#else
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MyProcPid = getpid(); /* reset MyProcPid */
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#endif
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closesocket(pgStatPipe[1]);
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closesocket(pgStatSock);
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pmPipe = pgStatPmPipe[0];
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/*
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* In the child we can have default SIGCHLD handling (in case we want
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@ -1322,8 +1444,6 @@ pgstat_main(void)
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*/
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pqsignal(SIGCHLD, SIG_DFL);
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MyProcPid = getpid(); /* reset MyProcPid */
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/*
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* Identify myself via ps
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*/
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|
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@ -37,7 +37,7 @@
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*
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||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.352 2003/12/20 17:31:21 momjian Exp $
|
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* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.353 2003/12/25 03:52:51 momjian Exp $
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*
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* NOTES
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*
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@ -289,6 +289,7 @@ static void RandomSalt(char *cryptSalt, char *md5Salt);
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static void SignalChildren(int signal);
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static int CountChildren(void);
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static bool CreateOptsFile(int argc, char *argv[]);
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NON_EXEC_STATIC void SSDataBaseInit(int xlop);
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static pid_t SSDataBase(int xlop);
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static void
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postmaster_error(const char *fmt,...)
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@ -296,8 +297,8 @@ postmaster_error(const char *fmt,...)
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__attribute__((format(printf, 1, 2)));
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#ifdef EXEC_BACKEND
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static void
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write_backend_variables(pid_t pid, Port *port);
|
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void read_backend_variables(pid_t pid, Port *port);
|
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static void write_backend_variables(pid_t pid, Port *port);
|
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#endif
|
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#define StartupDataBase() SSDataBase(BS_XLOG_STARTUP)
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|
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@ -2848,9 +2849,46 @@ CountChildren(void)
|
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/*
|
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* Fire off a subprocess for startup/shutdown/checkpoint.
|
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*
|
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* Return value is subprocess' PID, or 0 if failed to start subprocess
|
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* Return value of SSDataBase is subprocess' PID, or 0 if failed to start subprocess
|
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* (0 is returned only for checkpoint case).
|
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*/
|
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NON_EXEC_STATIC void
|
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SSDataBaseInit(int xlop)
|
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{
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const char *statmsg;
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|
||||
IsUnderPostmaster = true; /* we are a postmaster subprocess
|
||||
* now */
|
||||
|
||||
/* Lose the postmaster's on-exit routines and port connections */
|
||||
on_exit_reset();
|
||||
|
||||
/*
|
||||
* Identify myself via ps
|
||||
*/
|
||||
switch (xlop)
|
||||
{
|
||||
case BS_XLOG_STARTUP:
|
||||
statmsg = "startup subprocess";
|
||||
break;
|
||||
case BS_XLOG_CHECKPOINT:
|
||||
statmsg = "checkpoint subprocess";
|
||||
break;
|
||||
case BS_XLOG_BGWRITER:
|
||||
statmsg = "bgwriter subprocess";
|
||||
break;
|
||||
case BS_XLOG_SHUTDOWN:
|
||||
statmsg = "shutdown subprocess";
|
||||
break;
|
||||
default:
|
||||
statmsg = "??? subprocess";
|
||||
break;
|
||||
}
|
||||
init_ps_display(statmsg, "", "");
|
||||
set_ps_display("");
|
||||
}
|
||||
|
||||
|
||||
static pid_t
|
||||
SSDataBase(int xlop)
|
||||
{
|
||||
|
|
@ -2876,16 +2914,11 @@ SSDataBase(int xlop)
|
|||
|
||||
if ((pid = fork()) == 0) /* child */
|
||||
{
|
||||
const char *statmsg;
|
||||
char *av[10];
|
||||
int ac = 0;
|
||||
char nbbuf[32];
|
||||
char xlbuf[32];
|
||||
|
||||
#ifdef EXEC_BACKEND
|
||||
char pbuf[NAMEDATALEN + 256];
|
||||
#endif
|
||||
|
||||
#ifdef LINUX_PROFILE
|
||||
setitimer(ITIMER_PROF, &prof_itimer, NULL);
|
||||
#endif
|
||||
|
|
@ -2895,65 +2928,47 @@ SSDataBase(int xlop)
|
|||
beos_backend_startup();
|
||||
#endif
|
||||
|
||||
IsUnderPostmaster = true; /* we are a postmaster subprocess
|
||||
* now */
|
||||
|
||||
/* Lose the postmaster's on-exit routines and port connections */
|
||||
on_exit_reset();
|
||||
|
||||
/* Close the postmaster's sockets */
|
||||
ClosePostmasterPorts(true);
|
||||
|
||||
/*
|
||||
* Identify myself via ps
|
||||
*/
|
||||
switch (xlop)
|
||||
{
|
||||
case BS_XLOG_STARTUP:
|
||||
statmsg = "startup subprocess";
|
||||
break;
|
||||
case BS_XLOG_CHECKPOINT:
|
||||
statmsg = "checkpoint subprocess";
|
||||
break;
|
||||
case BS_XLOG_BGWRITER:
|
||||
statmsg = "bgwriter subprocess";
|
||||
break;
|
||||
case BS_XLOG_SHUTDOWN:
|
||||
statmsg = "shutdown subprocess";
|
||||
break;
|
||||
default:
|
||||
statmsg = "??? subprocess";
|
||||
break;
|
||||
}
|
||||
init_ps_display(statmsg, "", "");
|
||||
set_ps_display("");
|
||||
#ifndef EXEC_BACKEND
|
||||
SSDataBaseInit(xlop);
|
||||
#endif
|
||||
|
||||
/* Set up command-line arguments for subprocess */
|
||||
av[ac++] = "postgres";
|
||||
|
||||
#ifdef EXEC_BACKEND
|
||||
av[ac++] = "-boot";
|
||||
#endif
|
||||
|
||||
snprintf(nbbuf, sizeof(nbbuf), "-B%d", NBuffers);
|
||||
av[ac++] = nbbuf;
|
||||
|
||||
snprintf(xlbuf, sizeof(xlbuf), "-x%d", xlop);
|
||||
av[ac++] = xlbuf;
|
||||
|
||||
av[ac++] = "-p";
|
||||
#ifdef EXEC_BACKEND
|
||||
Assert(UsedShmemSegID != 0 && UsedShmemSegAddr != NULL);
|
||||
/* database name at the end because it might contain commas */
|
||||
snprintf(pbuf, sizeof(pbuf), "%lu,%p,%s",
|
||||
UsedShmemSegID, UsedShmemSegAddr, "template1");
|
||||
av[ac++] = pbuf;
|
||||
#else
|
||||
av[ac++] = "template1";
|
||||
write_backend_variables(getpid(),NULL);
|
||||
|
||||
/* pass data dir before end of secure switches (-p) */
|
||||
av[ac++] = "-D";
|
||||
av[ac++] = DataDir;
|
||||
#endif
|
||||
av[ac++] = "-p";
|
||||
av[ac++] = "template1";
|
||||
|
||||
av[ac] = (char *) NULL;
|
||||
|
||||
Assert(ac < lengthof(av));
|
||||
|
||||
#ifdef EXEC_BACKEND
|
||||
if (execv(pg_pathname,av) == -1)
|
||||
elog(FATAL,"unable to execv in SSDataBase: %m");
|
||||
#else
|
||||
BootstrapMain(ac, av);
|
||||
ExitPostmaster(0);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* in parent */
|
||||
|
|
@ -3107,17 +3122,17 @@ extern slock_t *ProcStructLock;
|
|||
extern int pgStatSock;
|
||||
|
||||
#define write_var(var,fp) fwrite((void*)&(var),sizeof(var),1,fp)
|
||||
#define read_var(var,fp) fread((void*)&(var),sizeof(var),1,fp);
|
||||
#define read_var(var,fp) fread((void*)&(var),sizeof(var),1,fp)
|
||||
#define get_tmp_backend_file_name(buf,id) \
|
||||
do { \
|
||||
Assert(DataDir); \
|
||||
sprintf((buf), \
|
||||
"%s/%s/%s.backend_var.%d", \
|
||||
DataDir, \
|
||||
PG_TEMP_FILES_DIR, \
|
||||
PG_TEMP_FILE_PREFIX, \
|
||||
(id)); \
|
||||
} while (0)
|
||||
do { \
|
||||
Assert(DataDir); \
|
||||
sprintf((buf), \
|
||||
"%s/%s/%s.backend_var.%d", \
|
||||
DataDir, \
|
||||
PG_TEMP_FILES_DIR, \
|
||||
PG_TEMP_FILE_PREFIX, \
|
||||
(id)); \
|
||||
} while (0)
|
||||
|
||||
static void
|
||||
write_backend_variables(pid_t pid, Port *port)
|
||||
|
|
@ -3146,11 +3161,16 @@ write_backend_variables(pid_t pid, Port *port)
|
|||
}
|
||||
|
||||
/* Write vars */
|
||||
write_var(port->sock,fp);
|
||||
write_var(port->proto,fp);
|
||||
write_var(port->laddr,fp);
|
||||
write_var(port->raddr,fp);
|
||||
write_var(port->canAcceptConnections,fp);
|
||||
if (port)
|
||||
{
|
||||
write_var(port->sock,fp);
|
||||
write_var(port->proto,fp);
|
||||
write_var(port->laddr,fp);
|
||||
write_var(port->raddr,fp);
|
||||
write_var(port->canAcceptConnections,fp);
|
||||
write_var(port->cryptSalt,fp);
|
||||
write_var(port->md5Salt,fp);
|
||||
}
|
||||
write_var(MyCancelKey,fp);
|
||||
|
||||
write_var(RedoRecPtr,fp);
|
||||
|
|
@ -3190,11 +3210,16 @@ read_backend_variables(pid_t pid, Port *port)
|
|||
}
|
||||
|
||||
/* Read vars */
|
||||
read_var(port->sock,fp);
|
||||
read_var(port->proto,fp);
|
||||
read_var(port->laddr,fp);
|
||||
read_var(port->raddr,fp);
|
||||
read_var(port->canAcceptConnections,fp);
|
||||
if (port)
|
||||
{
|
||||
read_var(port->sock,fp);
|
||||
read_var(port->proto,fp);
|
||||
read_var(port->laddr,fp);
|
||||
read_var(port->raddr,fp);
|
||||
read_var(port->canAcceptConnections,fp);
|
||||
read_var(port->cryptSalt,fp);
|
||||
read_var(port->md5Salt,fp);
|
||||
}
|
||||
read_var(MyCancelKey,fp);
|
||||
|
||||
read_var(RedoRecPtr,fp);
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.142 2003/12/21 00:33:33 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.143 2003/12/25 03:52:51 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -122,20 +122,31 @@ ProcGlobalSemas(int maxBackends)
|
|||
void
|
||||
InitProcGlobal(int maxBackends)
|
||||
{
|
||||
bool found = false;
|
||||
bool foundProcGlobal, foundDummy;
|
||||
|
||||
/* Create or attach to the ProcGlobal shared structure */
|
||||
ProcGlobal = (PROC_HDR *)
|
||||
ShmemInitStruct("Proc Header", sizeof(PROC_HDR), &found);
|
||||
ShmemInitStruct("Proc Header", sizeof(PROC_HDR), &foundProcGlobal);
|
||||
|
||||
/* --------------------
|
||||
* We're the first - initialize.
|
||||
* XXX if found should ever be true, it is a sign of impending doom ...
|
||||
* ought to complain if so?
|
||||
* --------------------
|
||||
/*
|
||||
* Create or attach to the PGPROC structures for dummy (checkpoint)
|
||||
* processes, too. This does not get linked into the freeProcs
|
||||
* list.
|
||||
*/
|
||||
if (!found)
|
||||
DummyProc = (PGPROC *)
|
||||
ShmemInitStruct("DummyProc",sizeof(PGPROC) * NUM_DUMMY_PROCS, &foundDummy);
|
||||
|
||||
if (foundProcGlobal || foundDummy)
|
||||
{
|
||||
/* both should be present or neither */
|
||||
Assert(foundProcGlobal && foundDummy);
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
/*
|
||||
* We're the first - initialize.
|
||||
*/
|
||||
int i;
|
||||
|
||||
ProcGlobal->freeProcs = INVALID_OFFSET;
|
||||
|
|
@ -159,16 +170,6 @@ InitProcGlobal(int maxBackends)
|
|||
ProcGlobal->freeProcs = MAKE_OFFSET(proc);
|
||||
}
|
||||
|
||||
/*
|
||||
* Pre-allocate a PGPROC structure for dummy (checkpoint)
|
||||
* processes, too. This does not get linked into the freeProcs
|
||||
* list.
|
||||
*/
|
||||
DummyProc = (PGPROC *) ShmemAlloc(sizeof(PGPROC) * NUM_DUMMY_PROCS);
|
||||
if (!DummyProc)
|
||||
ereport(FATAL,
|
||||
(errcode(ERRCODE_OUT_OF_MEMORY),
|
||||
errmsg("out of shared memory")));
|
||||
MemSet(DummyProc, 0, sizeof(PGPROC) * NUM_DUMMY_PROCS);
|
||||
for (i = 0; i < NUM_DUMMY_PROCS; i++)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.380 2003/12/20 17:31:21 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.381 2003/12/25 03:52:51 momjian Exp $
|
||||
*
|
||||
* NOTES
|
||||
* this is the "main" module of the postgres backend and
|
||||
|
|
@ -2063,7 +2063,7 @@ PostgresMain(int argc, char *argv[], const char *username)
|
|||
*
|
||||
* If we are running under the postmaster, this is done already.
|
||||
*/
|
||||
if (!IsUnderPostmaster /* when exec || ExecBackend */)
|
||||
if (!IsUnderPostmaster || ExecBackend)
|
||||
MemoryContextInit();
|
||||
|
||||
set_ps_display("startup");
|
||||
|
|
@ -2076,7 +2076,7 @@ PostgresMain(int argc, char *argv[], const char *username)
|
|||
Noversion = false;
|
||||
EchoQuery = false;
|
||||
|
||||
if (!IsUnderPostmaster /* when exec || ExecBackend */ )
|
||||
if (!IsUnderPostmaster)
|
||||
{
|
||||
InitializeGUCOptions();
|
||||
potential_DataDir = getenv("PGDATA");
|
||||
|
|
|
|||
|
|
@ -5,7 +5,7 @@
|
|||
*
|
||||
* Copyright (c) 2001-2003, PostgreSQL Global Development Group
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.17 2003/11/29 22:40:53 pgsql Exp $
|
||||
* $PostgreSQL: pgsql/src/include/pgstat.h,v 1.18 2003/12/25 03:52:51 momjian Exp $
|
||||
* ----------
|
||||
*/
|
||||
#ifndef PGSTAT_H
|
||||
|
|
@ -326,6 +326,18 @@ typedef union PgStat_Msg
|
|||
} PgStat_Msg;
|
||||
|
||||
|
||||
#ifdef EXEC_BACKEND
|
||||
typedef enum STATS_PROCESS_TYPE
|
||||
{
|
||||
STAT_PROC_BUFFER,
|
||||
STAT_PROC_COLLECTOR
|
||||
} STATS_PROCESS_TYPE;
|
||||
#define PGSTAT_FORK_ARGS int argc, char *argv[]
|
||||
#else
|
||||
#define PGSTAT_FORK_ARGS void
|
||||
#endif
|
||||
|
||||
|
||||
/* ----------
|
||||
* GUC parameters
|
||||
* ----------
|
||||
|
|
@ -342,6 +354,17 @@ extern bool pgstat_collect_blocklevel;
|
|||
*/
|
||||
extern bool pgstat_is_running;
|
||||
|
||||
|
||||
/* ----------
|
||||
* Functions called from main
|
||||
* ----------
|
||||
*/
|
||||
#ifdef EXEC_BACKEND
|
||||
extern void pgstat_main(PGSTAT_FORK_ARGS);
|
||||
extern void pgstat_mainChild(PGSTAT_FORK_ARGS);
|
||||
#endif
|
||||
|
||||
|
||||
/* ----------
|
||||
* Functions called from postmaster
|
||||
* ----------
|
||||
|
|
|
|||
Loading…
Reference in New Issue