mirror of
https://github.com/postgres/postgres.git
synced 2025-05-28 00:03:23 -04:00
Rearrange config.h entries into a more sensible order, and add some
documentation. Let's try to keep this file a bit neater in future, hmm? Also (to get back to the original point) update info about FUNC_MAX_ARGS, and add additional config symbols for debugging new memory management changes.
This commit is contained in:
Tom Lane
parent
d1080d19b1
commit
6a7b40d909
@ -3,12 +3,12 @@
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*
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* config.h.in is processed by configure to produce config.h.
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*
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* If you want to modify any of the tweakable settings in the first part
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* If you want to modify any of the tweakable settings in Part 2
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* of this file, you can do it in config.h.in before running configure,
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* or in config.h afterwards. Of course, if you edit config.h, then your
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* changes will be overwritten the next time you run configure.
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*
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* $Id: config.h.in,v 1.120 2000/06/19 16:58:37 petere Exp $
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* $Id: config.h.in,v 1.121 2000/06/29 05:50:29 tgl Exp $
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*/
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#ifndef CONFIG_H
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@ -16,12 +16,75 @@
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/*
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* Default runtime limit on number of backend server processes per postmaster;
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*------------------------------------------------------------------------
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* Part 1: feature symbols and limits that are set by configure based on
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* user-supplied switches. This is first so that stuff in Part 2 can
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* depend on these values.
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*
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* Beware of "fixing" configure-time mistakes by editing these values,
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* since configure may have inserted the settings in other files as well
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* as here. Best to rerun configure if you forgot --enable-multibyte
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* or whatever.
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*------------------------------------------------------------------------
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*/
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/* Set to 1 if you want LOCALE support (--enable-locale) */
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#undef USE_LOCALE
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/* Set to 1 if you want cyrillic recode (--enable-recode) */
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#undef CYR_RECODE
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/* Set to 1 if you want to use multibyte characters (--enable-multibyte) */
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#undef MULTIBYTE
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/* Set to 1 if you want ASSERT checking (--enable-cassert) */
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#undef USE_ASSERT_CHECKING
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/* Set to 1 to use syslog() to write postmaster log (--enable-syslog) */
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/* (CAUTION: large log entries confuse syslog on many platforms!) */
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#undef ENABLE_SYSLOG
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/* Define to build with Kerberos 4 support (--with-krb4[=DIR]) */
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#undef KRB4
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/* Define to build with Kerberos 5 support (--with-krb5[=DIR]) */
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#undef KRB5
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/* Kerberos name of the Postgres service principal (--with-krb-srvnam=NAME) */
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#undef PG_KRB_SRVNAM
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/* Location of the Kerberos server's keytab file (--with-krb-srvtab=FILE) */
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#undef PG_KRB_SRVTAB
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/*
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* DEF_PGPORT is the TCP port number on which the Postmaster listens and
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* which clients will try to connect to. This is just a default value;
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* it can be overridden at postmaster or client startup. It's awfully
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* convenient if your clients have the right default compiled in, though.
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* (--with-pgport=PORTNUM)
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*/
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#undef DEF_PGPORT
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/* ... and once more as a string constant instead */
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#undef DEF_PGPORT_STR
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/*
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* Default soft limit on number of backend server processes per postmaster;
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* this is just the default setting for the postmaster's -N switch.
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* (Actual value is now set by configure script.)
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* (--with-maxbackends=N)
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*/
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#undef DEF_MAXBACKENDS
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/*
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*------------------------------------------------------------------------
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* Part 2: feature symbols and limits that are user-configurable, but
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* only by editing this file ... there's no configure support for them.
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*
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* Editing this file and doing a full rebuild (and an initdb if noted)
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* should be sufficient to change any of these.
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*------------------------------------------------------------------------
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*/
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/*
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* Hard limit on number of backend server processes per postmaster.
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* Increasing this costs about 32 bytes per process slot as of v 6.5.
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@ -40,8 +103,11 @@
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/*
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* Size of a disk block --- currently, this limits the size of a tuple.
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* You can set it bigger if you need bigger tuples.
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*
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* CAUTION: changing BLCKSZ requires an initdb.
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*
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* currently must be <= 32k bjm
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*/
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/* currently must be <= 32k bjm */
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#define BLCKSZ 8192
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/*
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@ -57,8 +123,7 @@
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* best to err in the direction of a small limit. (Besides, a power-of-2
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* value saves a few cycles in md.c.)
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*
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* CAUTION: you had best do an initdb if you change either BLCKSZ or
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* RELSEG_SIZE.
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* CAUTION: changing RELSEG_SIZE requires an initdb.
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*/
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#define RELSEG_SIZE (0x40000000 / BLCKSZ)
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@ -66,28 +131,20 @@
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* Maximum number of columns in an index and maximum number of arguments
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* to a function. They must be the same value.
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*
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* The minimum value is 9 (btree index creation has a 9-argument function).
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* The minimum value is 8 (index creation uses 8-argument functions).
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* There is no specific upper limit, although large values will waste
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* system-table space and processing time.
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*
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* There is no maximum value, though if you want to pass more than 32
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* arguments to a function, you will have to modify
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* pgsql/src/backend/utils/fmgr/fmgr.c and add additional entries
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* to the 'case' statement for the additional arguments.
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* CAUTION: changing these requires an initdb.
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*
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* BTW: if you need to call dynamically-loaded old-style C functions that
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* have more than 16 arguments, you will also need to add cases to the
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* switch statement in fmgr_oldstyle() in src/backend/utils/fmgr/fmgr.c.
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* But consider converting such functions to new-style instead...
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*/
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#define INDEX_MAX_KEYS 16
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#define FUNC_MAX_ARGS INDEX_MAX_KEYS
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/*
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* Enables debugging print statements in the date/time support routines.
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* Particularly useful for porting to a new platform/OS combination.
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*/
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/* #define DATEDEBUG */
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/*
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* defining unsafe floats's will make float4 and float8
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* ops faster at the cost of safety, of course!
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*/
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/* #define UNSAFE_FLOATS */
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/*
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* Define this to make libpgtcl's "pg_result -assign" command process C-style
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* backslash sequences in returned tuple data and convert Postgres array
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@ -134,29 +191,6 @@
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*/
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#define FASTBUILD /* access/nbtree/nbtsort.c */
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/*
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* TBL_FREE_CMD_MEMORY: free memory allocated for a user query inside
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* transaction block after this query is done.
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*/
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#define TBL_FREE_CMD_MEMORY
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#undef ENABLE_SYSLOG
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/* Debug #defines */
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/* #define IPORTAL_DEBUG */
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/* #define HEAPDEBUGALL */
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/* #define ISTRATDEBUG */
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/* #define FASTBUILD_DEBUG */
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/* #define ACLDEBUG */
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/* #define RTDEBUG */
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/* #define GISTDEBUG */
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/* #define OMIT_PARTIAL_INDEX */
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/* #define NO_BUFFERISVALID */
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/* #define NO_SECURITY */
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/* #define OLD_REWRITE */
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/* #define LOCK_DEBUG */
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/*
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* MAXPGPATH: standard size of a pathname buffer in Postgres (hence,
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* maximum usable pathname length is one less).
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@ -174,33 +208,62 @@
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*/
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#define DEFAULT_MAX_EXPR_DEPTH 10000
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/*
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*------------------------------------------------------------------------
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* Everything past here is set by the configure script.
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* These hand-configurable symbols are for enabling debugging code,
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* not for controlling user-visible features or resource limits.
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*------------------------------------------------------------------------
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*/
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/* Set to 1 if you want to USE_LOCALE */
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#undef USE_LOCALE
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/* Define this to cause pfree()'d memory to be cleared immediately,
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* to facilitate catching bugs that refer to already-freed values.
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* XXX For 7.1 development, define this automatically if --enable-cassert.
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* In the long term it probably doesn't need to be on by default.
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*/
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#ifdef USE_ASSERT_CHECKING
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#define CLOBBER_FREED_MEMORY
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#endif
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/* Set to 1 if you want CYR_RECODE (cyrillic recode) */
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#undef CYR_RECODE
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/* Define this to force all parse and plan trees to be passed through
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* copyObject(), to facilitate catching errors and omissions in copyObject().
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* XXX For 7.1 development, define this automatically if --enable-cassert.
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* In the long term it probably doesn't need to be on by default.
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*/
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#ifdef USE_ASSERT_CHECKING
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#define COPY_PARSE_PLAN_TREES
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#endif
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/* Set to 1 if you want to use multibyte characters */
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#undef MULTIBYTE
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/* Enable debugging print statements in the date/time support routines. */
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/* #define DATEDEBUG */
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/* Set to 1 if you want to Enable ASSERT CHECKING */
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#undef USE_ASSERT_CHECKING
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/*
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* Other debug #defines (documentation, anyone?)
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*/
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/* #define IPORTAL_DEBUG */
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/* #define HEAPDEBUGALL */
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/* #define ISTRATDEBUG */
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/* #define FASTBUILD_DEBUG */
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/* #define ACLDEBUG */
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/* #define RTDEBUG */
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/* #define GISTDEBUG */
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/* #define OMIT_PARTIAL_INDEX */
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/* #define NO_SECURITY */
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/* #define LOCK_DEBUG */
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/*
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* DEF_PGPORT is the TCP port number on which the Postmaster listens by
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* default. This can be overriden by command options, environment variables,
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* and the postconfig hook. (now set by configure script)
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*/
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#undef DEF_PGPORT
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/* ... and once more as a string constant instead */
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#undef DEF_PGPORT_STR
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/*
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* defining unsafe floats's will make float4 and float8
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* ops faster at the cost of safety, of course!
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*/
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/* #define UNSAFE_FLOATS */
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/*
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*------------------------------------------------------------------------
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* Part 3: system configuration information that is auto-detected by
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* configure. In theory you shouldn't have to touch any of this stuff
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* by hand. In the real world, configure might get it wrong...
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*------------------------------------------------------------------------
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*/
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/* Define const as empty if your compiler doesn't grok const. */
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#undef const
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@ -298,23 +361,12 @@
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/* Set to 1 if you have libreadline and it includes history functions */
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#undef HAVE_HISTORY_IN_READLINE
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/*
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* Block of parameters for the ODBC code.
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*/
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/* Set to 1 if you have <pwd.h> */
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#undef HAVE_PWD_H
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/* Define if you have the <sys/param.h> header file. */
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#undef HAVE_SYS_PARAM_H
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/* Define if you have the dl library (-ldl). */
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#undef HAVE_LIBDL
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/*
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* End parameters for ODBC code.
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*/
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/* Set to 1 if you gettimeofday(a,b) vs gettimeofday(a) */
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#undef GETTIMEOFDAY_1ARG
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#ifdef GETTIMEOFDAY_1ARG
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@ -336,8 +388,13 @@
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/* Set to 1 if you have strerror() */
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#undef HAVE_STRERROR
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/* Set to 1 if you have isinf() */
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#undef HAVE_ISINF
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#ifndef HAVE_ISINF
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extern int isinf(double x);
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#endif
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/*
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* Set to 1 if you have isinf().
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* These are all related to port/isinf.c
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*/
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#undef HAVE_FPCLASS
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@ -346,15 +403,10 @@
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#undef HAVE_FP_CLASS_D
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#undef HAVE_CLASS
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#undef HAVE_ISINF
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#ifndef HAVE_ISINF
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int isinf(double x);
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#endif
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/* Set to 1 if you have gethostname() */
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#undef HAVE_GETHOSTNAME
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#ifndef HAVE_GETHOSTNAME
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int gethostname(char *name, int namelen);
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extern int gethostname(char *name, int namelen);
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#endif
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/* Set to 1 if struct tm has a tm_zone member */
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@ -380,7 +432,7 @@ int gethostname(char *name, int namelen);
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# endif
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# include <arpa/inet.h>
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# endif
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extern int inet_aton(const char *cp, struct in_addr * addr);
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extern int inet_aton(const char *cp, struct in_addr * addr);
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#endif
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/* Set to 1 if you have fcvt() */
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@ -427,7 +479,7 @@ extern int inet_aton(const char *cp, struct in_addr * addr);
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/* Set to 1 if you have sigprocmask() */
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#undef HAVE_STRCASECMP
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#ifndef HAVE_STRCASECMP
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extern int strcasecmp(char *s1, char *s2);
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extern int strcasecmp(char *s1, char *s2);
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#endif
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/* Set to 1 if you have strtol() */
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@ -472,13 +524,6 @@ extern void srandom(unsigned int seed);
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/* Set to 1 if you have getopt_long() (GNU long options) */
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#undef HAVE_GETOPT_LONG
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/*
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* On architectures for which we have not implemented spinlocks (or
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* cannot do so), we use System V semaphores. We also use them for
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* long locks. For some reason union semun is never defined in the
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* System V header files so we must do it ourselves.
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*/
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/* Set to 1 if you have union semun */
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#undef HAVE_UNION_SEMUN
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@ -494,7 +539,8 @@ extern void srandom(unsigned int seed);
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/* Define this as the appropriate snprintf format for 64-bit ints, if any */
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#undef INT64_FORMAT
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/* These must be defined as the alignment requirement (NOT the size) of
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/*
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* These must be defined as the alignment requirement (NOT the size) of
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* each of the basic C data types (except char, which we assume has align 1).
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* MAXIMUM_ALIGNOF is the largest alignment requirement for any C data type.
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* ALIGNOF_LONG_LONG_INT need only be defined if HAVE_LONG_LONG_INT_64 is.
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@ -506,7 +552,7 @@ extern void srandom(unsigned int seed);
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#undef ALIGNOF_DOUBLE
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#undef MAXIMUM_ALIGNOF
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/* Define as the type of the type of the 3rd argument to accept() */
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/* Define as the type of the 3rd argument to accept() */
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#undef ACCEPT_TYPE_ARG3
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/* Define if POSIX signal interface is available */
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@ -518,17 +564,15 @@ extern void srandom(unsigned int seed);
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/* Define if C++ compiler accepts "#include <string>" */
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#undef HAVE_CXX_STRING_HEADER
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/* Define if you are building with Kerberos 4 support */
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#undef KRB4
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/* Define if you are building with Kerberos 5 support */
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#undef KRB5
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/* The name of the Postgres service principal in Kerberos */
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#undef PG_KRB_SRVNAM
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/* The location of the Kerberos server's keytab file */
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#undef PG_KRB_SRVTAB
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/*
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*------------------------------------------------------------------------
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* Part 4: pull in system-specific declarations.
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*
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* This is still configure's responsibility, because it picks where
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* the "os.h" symlink points...
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*------------------------------------------------------------------------
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*/
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/*
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* Pull in OS-specific declarations (using link created by configure)
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@ -538,15 +582,15 @@ extern void srandom(unsigned int seed);
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/*
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* The following is used as the arg list for signal handlers. Any ports
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* that take something other than an int argument should change this in
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* the port specific makefile. Note that variable names are required
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* that take something other than an int argument should override this in
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* the port-specific os.h file. Note that variable names are required
|
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* because it is used in both the prototypes as well as the definitions.
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* Note also the long name. We expect that this won't collide with
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* other names causing compiler warnings.
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*/
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#ifndef SIGNAL_ARGS
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# define SIGNAL_ARGS int postgres_signal_arg
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#ifndef SIGNAL_ARGS
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#define SIGNAL_ARGS int postgres_signal_arg
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#endif
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