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Further speed up pg_upgrade lookups.

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This commit is contained in:
Bruce Momjian 2010-10-20 02:05:43 +00:00
parent c33bfb8b9b
commit 3325c9bddb
2 changed files with 20 additions and 18 deletions
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37
contrib/pg_upgrade/info.c
View File

@ -66,7 +66,7 @@ gen_db_file_maps(DbInfo *old_db, DbInfo *new_db,
if (strcmp(newrel->nspname, "pg_toast") == 0)
continue;
oldrel = relarr_lookup_rel(&(old_db->rel_arr), newrel->nspname,
oldrel = relarr_lookup_rel(&old_db->rel_arr, newrel->nspname,
newrel->relname, CLUSTER_OLD);
map_rel(oldrel, newrel, old_db, new_db, old_pgdata, new_pgdata,
@ -275,7 +275,7 @@ get_db_and_rel_infos(DbInfoArr *db_arr, Cluster whichCluster)
for (dbnum = 0; dbnum < db_arr->ndbs; dbnum++)
get_rel_infos(&db_arr->dbs[dbnum],
&(db_arr->dbs[dbnum].rel_arr), whichCluster);
&db_arr->dbs[dbnum].rel_arr, whichCluster);
if (log.debug)
dbarr_print(db_arr, whichCluster);
@ -292,8 +292,7 @@ get_db_and_rel_infos(DbInfoArr *db_arr, Cluster whichCluster)
* FirstNormalObjectId belongs to the user
*/
static void
get_rel_infos(const DbInfo *dbinfo,
RelInfoArr *relarr, Cluster whichCluster)
get_rel_infos(const DbInfo *dbinfo, RelInfoArr *relarr, Cluster whichCluster)
{
PGconn *conn = connectToServer(dbinfo->db_name, whichCluster);
PGresult *res;
@ -386,6 +385,7 @@ get_rel_infos(const DbInfo *dbinfo,
relarr->rels = relinfos;
relarr->nrels = num_rels;
relarr->cache_name_rel = 0;
}
@ -419,31 +419,31 @@ dbarr_lookup_db(DbInfoArr *db_arr, const char *db_name)
* RelInfo structure.
*/
static RelInfo *
relarr_lookup_rel(RelInfoArr *rel_arr,
const char *nspname, const char *relname,
Cluster whichCluster)
relarr_lookup_rel(RelInfoArr *rel_arr, const char *nspname,
const char *relname, Cluster whichCluster)
{
static int relnum = 0;
int relnum;
if (!rel_arr || !relname)
return NULL;
/* Test most recent lookup first, for speed */
if (relnum < rel_arr->nrels &&
strcmp(rel_arr->rels[relnum].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[relnum].relname, relname) == 0)
return &rel_arr->rels[relnum];
if (relnum + 1 < rel_arr->nrels &&
strcmp(rel_arr->rels[relnum + 1].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[relnum + 1].relname, relname) == 0)
return &rel_arr->rels[relnum + 1];
/* Test next lookup first, for speed */
if (rel_arr->cache_name_rel + 1 < rel_arr->nrels &&
strcmp(rel_arr->rels[rel_arr->cache_name_rel + 1].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[rel_arr->cache_name_rel + 1].relname, relname) == 0)
{
rel_arr->cache_name_rel++;
return &rel_arr->rels[rel_arr->cache_name_rel];
}
for (relnum = 0; relnum < rel_arr->nrels; relnum++)
{
if (strcmp(rel_arr->rels[relnum].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[relnum].relname, relname) == 0)
{
rel_arr->cache_name_rel = relnum;
return &rel_arr->rels[relnum];
}
}
pg_log(PG_FATAL, "Could not find %s.%s in %s cluster\n",
nspname, relname, CLUSTERNAME(whichCluster));
@ -483,6 +483,7 @@ relarr_free(RelInfoArr *rel_arr)
{
pg_free(rel_arr->rels);
rel_arr->nrels = 0;
rel_arr->cache_name_rel = 0;
}

1
contrib/pg_upgrade/pg_upgrade.h
View File

@ -78,6 +78,7 @@ typedef struct
{
RelInfo *rels;
int nrels;
int cache_name_rel; /* cache of last lookup location */
} RelInfoArr;
/*