Don't use Append mode when splits are caused by sub-page inserts

Sub-pages need room to grow...

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 3a82192..fb547ac 100644 (file)
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -4082,6 +4082,8 @@ new_sub:
        nflags = flags & NODE_ADD_FLAGS;
        nsize = IS_LEAF2(mc->mc_pg[mc->mc_top]) ? key->mv_size : mdb_leaf_size(mc->mc_txn->mt_env, key, rdata);
        if (SIZELEFT(mc->mc_pg[mc->mc_top]) < nsize) {
+               if (( flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA )
+                       nflags &= ~MDB_APPEND;
                rc = mdb_page_split(mc, key, rdata, P_INVALID, nflags);
        } else {
                /* There is room already in this leaf page. */