mirror/openldap
2
0
Fork 0
mirror of https://git.openldap.org/openldap/openldap.git synced 2025-03-13 14:27:59 +08:00
Code Issues Packages Projects Releases Wiki Activity

Precalculate max size of a node

Browse Source
This commit is contained in:
Howard Chu 2013-03-12 17:25:49 -07:00
parent 8c1d95a438
commit 3247d7cbd6
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
libraries/liblmdb/mdb.c
View File

@ -957,6 +957,8 @@ struct MDB_env {
MDB_ID2 me_dirty_list[MDB_IDL_UM_SIZE];
/** Max number of freelist items that can fit in a single overflow page */
unsigned int me_maxfree_1pg;
/** Max size of a node on a page */
unsigned int me_nodemax;
#ifdef _WIN32
HANDLE me_rmutex; /* Windows mutexes don't reside in shared mem */
HANDLE me_wmutex;
@ -2897,6 +2899,7 @@ mdb_env_open2(MDB_env *env)
}
env->me_psize = meta.mm_psize;
env->me_maxfree_1pg = (env->me_psize - PAGEHDRSZ) / sizeof(pgno_t) - 1;
env->me_nodemax = (env->me_psize - PAGEHDRSZ) / MDB_MINKEYS;
env->me_maxpg = env->me_mapsize / env->me_psize;
@ -5037,8 +5040,7 @@ reuse:
}
offset += offset & 1;
if (NODESIZE + sizeof(indx_t) + NODEKSZ(leaf) + NODEDSZ(leaf) +
offset >= (mc->mc_txn->mt_env->me_psize - PAGEHDRSZ) /
MDB_MINKEYS) {
offset >= mc->mc_txn->mt_env->me_nodemax) {
/* yes, convert it */
dummy.md_flags = 0;
if (mc->mc_db->md_flags & MDB_DUPFIXED) {
@ -5353,7 +5355,7 @@ mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data)
size_t sz;
sz = LEAFSIZE(key, data);
if (sz >= env->me_psize / MDB_MINKEYS) {
if (sz >= env->me_nodemax) {
/* put on overflow page */
sz -= data->mv_size - sizeof(pgno_t);
}
@ -5378,7 +5380,7 @@ mdb_branch_size(MDB_env *env, MDB_val *key)
size_t sz;
sz = INDXSIZE(key);
if (sz >= env->me_psize / MDB_MINKEYS) {
if (sz >= env->me_nodemax) {
/* put on overflow page */
/* not implemented */
/* sz -= key->size - sizeof(pgno_t); */
@ -5446,7 +5448,7 @@ mdb_node_add(MDB_cursor *mc, indx_t indx,
if (F_ISSET(flags, F_BIGDATA)) {
/* Data already on overflow page. */
node_size += sizeof(pgno_t);
} else if (node_size + data->mv_size >= mc->mc_txn->mt_env->me_psize / MDB_MINKEYS) {
} else if (node_size + data->mv_size >= mc->mc_txn->mt_env->me_nodemax) {
int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize);
int rc;
/* Put data on overflow page. */