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| author | Heikki Linnakangas | 2008-09-30 10:52:14 +0000 |
|---|---|---|
| committer | Heikki Linnakangas | 2008-09-30 10:52:14 +0000 |
| commit | 15c121b3ed7eb2f290e19533e41ccca734d23574 (patch) | |
| tree | b60226d720f87b82b5b44647e3d3031081cdfb07 /contrib/pageinspect/rawpage.c | |
| parent | 2dbc0ca937f8ba9c76866a99fd04866232acea95 (diff) | |
Rewrite the FSM. Instead of relying on a fixed-size shared memory segment, the
free space information is stored in a dedicated FSM relation fork, with each
relation (except for hash indexes; they don't use FSM).
This eliminates the max_fsm_relations and max_fsm_pages GUC options; remove any
trace of them from the backend, initdb, and documentation.
Rewrite contrib/pg_freespacemap to match the new FSM implementation. Also
introduce a new variant of the get_raw_page(regclass, int4, int4) function in
contrib/pageinspect that let's you to return pages from any relation fork, and
a new fsm_page_contents() function to inspect the new FSM pages.
Diffstat (limited to 'contrib/pageinspect/rawpage.c')
| -rw-r--r-- | contrib/pageinspect/rawpage.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/contrib/pageinspect/rawpage.c b/contrib/pageinspect/rawpage.c index 0bc6bdc0174..51c6ee179f4 100644 --- a/contrib/pageinspect/rawpage.c +++ b/contrib/pageinspect/rawpage.c @@ -8,7 +8,7 @@ * Copyright (c) 2007-2008, PostgreSQL Global Development Group * * IDENTIFICATION - * $PostgreSQL: pgsql/contrib/pageinspect/rawpage.c,v 1.6 2008/05/12 00:00:43 alvherre Exp $ + * $PostgreSQL: pgsql/contrib/pageinspect/rawpage.c,v 1.7 2008/09/30 10:52:09 heikki Exp $ * *------------------------------------------------------------------------- */ @@ -41,7 +41,8 @@ Datum get_raw_page(PG_FUNCTION_ARGS) { text *relname = PG_GETARG_TEXT_P(0); - uint32 blkno = PG_GETARG_UINT32(1); + uint32 forknum = PG_GETARG_UINT32(1); + uint32 blkno = PG_GETARG_UINT32(2); Relation rel; RangeVar *relrv; @@ -54,6 +55,11 @@ get_raw_page(PG_FUNCTION_ARGS) (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), (errmsg("must be superuser to use raw functions")))); + if (forknum > MAX_FORKNUM) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("invalid fork number"))); + relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname)); rel = relation_openrv(relrv, AccessShareLock); @@ -80,7 +86,7 @@ get_raw_page(PG_FUNCTION_ARGS) /* Take a verbatim copy of the page */ - buf = ReadBuffer(rel, blkno); + buf = ReadBufferWithFork(rel, forknum, blkno); LockBuffer(buf, BUFFER_LOCK_SHARE); memcpy(raw_page_data, BufferGetPage(buf), BLCKSZ); |