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Fix recovery cache code (thanks to Peter Eisentraut for

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pointing to bug).
This commit is contained in:
Vadim B. Mikheev
2000-10-31 23:56:36 +00:00
parent b99ee7f37d
commit 3706f08ace
1 changed files with 10 additions and 23 deletions
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33
src/backend/access/transam/xlogutils.c
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@ -238,15 +238,14 @@ static XLogRelDesc *_xlrelarr = NULL;
static Form_pg_class _xlpgcarr = NULL; static Form_pg_class _xlpgcarr = NULL;
static int _xlast = 0; static int _xlast = 0;
static int _xlcnt = 0; static int _xlcnt = 0;
#define _XLOG_INITRELCACHESIZE 32 #define _XLOG_RELCACHESIZE 512
#define _XLOG_MAXRELCACHESIZE 512
static void static void
_xl_init_rel_cache(void) _xl_init_rel_cache(void)
{ {
HASHCTL ctl; HASHCTL ctl;
_xlcnt = _XLOG_INITRELCACHESIZE; _xlcnt = _XLOG_RELCACHESIZE;
_xlast = 0; _xlast = 0;
_xlrelarr = (XLogRelDesc*) malloc(sizeof(XLogRelDesc) * _xlcnt); _xlrelarr = (XLogRelDesc*) malloc(sizeof(XLogRelDesc) * _xlcnt);
memset(_xlrelarr, 0, sizeof(XLogRelDesc) * _xlcnt); memset(_xlrelarr, 0, sizeof(XLogRelDesc) * _xlcnt);
@ -261,7 +260,7 @@ _xl_init_rel_cache(void)
ctl.datasize = sizeof(XLogRelDesc*); ctl.datasize = sizeof(XLogRelDesc*);
ctl.hash = tag_hash; ctl.hash = tag_hash;
_xlrelcache = hash_create(_XLOG_INITRELCACHESIZE, &ctl, _xlrelcache = hash_create(_XLOG_RELCACHESIZE, &ctl,
HASH_ELEM | HASH_FUNCTION); HASH_ELEM | HASH_FUNCTION);
} }
@ -297,6 +296,8 @@ _xl_remove_hash_entry(XLogRelDesc **edata, int dummy)
static XLogRelDesc* static XLogRelDesc*
_xl_new_reldesc(void) _xl_new_reldesc(void)
{ {
XLogRelDesc *res;
_xlast++; _xlast++;
if (_xlast < _xlcnt) if (_xlast < _xlcnt)
{ {
@ -304,27 +305,13 @@ _xl_new_reldesc(void)
return(&(_xlrelarr[_xlast])); return(&(_xlrelarr[_xlast]));
} }
if ( 2 * _xlcnt <= _XLOG_MAXRELCACHESIZE) /* reuse */
{ res = _xlrelarr[0].moreRecently;
_xlrelarr = (XLogRelDesc*) realloc(_xlrelarr,
2 * sizeof(XLogRelDesc) * _xlcnt);
memset(&(_xlrelarr[_xlcnt]), 0, sizeof(XLogRelDesc) * _xlcnt);
_xlpgcarr = (Form_pg_class) realloc(_xlpgcarr,
2 * sizeof(FormData_pg_class) * _xlcnt);
memset(&(_xlpgcarr[_xlcnt]), 0, sizeof(FormData_pg_class) * _xlcnt);
_xlcnt += _xlcnt;
_xlrelarr[_xlast].reldata.rd_rel = &(_xlpgcarr[_xlast]);
return(&(_xlrelarr[_xlast]));
}
else /* reuse */
{
XLogRelDesc *res = _xlrelarr[0].moreRecently;
_xl_remove_hash_entry(&res, 0); _xl_remove_hash_entry(&res, 0);
_xlast--; _xlast--;
return(res); return(res);
}
} }
extern void CreateDummyCaches(void); extern void CreateDummyCaches(void);