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diff --git a/storage/tokudb/ft-index/locktree/tests/locktree_escalation_1big7lt_1small.cc b/storage/tokudb/ft-index/locktree/tests/locktree_escalation_1big7lt_1small.cc
new file mode 100644
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+++ b/storage/tokudb/ft-index/locktree/tests/locktree_escalation_1big7lt_1small.cc
@@ -0,0 +1,304 @@
+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*
+COPYING CONDITIONS NOTICE:
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation, and provided that the
+  following conditions are met:
+
+      * Redistributions of source code must retain this COPYING
+        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
+        DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
+        PATENT MARKING NOTICE (below), and the PATENT RIGHTS
+        GRANT (below).
+
+      * Redistributions in binary form must reproduce this COPYING
+        CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
+        DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
+        PATENT MARKING NOTICE (below), and the PATENT RIGHTS
+        GRANT (below) in the documentation and/or other materials
+        provided with the distribution.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+  02110-1301, USA.
+
+COPYRIGHT NOTICE:
+
+  TokuDB, Tokutek Fractal Tree Indexing Library.
+  Copyright (C) 2007-2013 Tokutek, Inc.
+
+DISCLAIMER:
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+UNIVERSITY PATENT NOTICE:
+
+  The technology is licensed by the Massachusetts Institute of
+  Technology, Rutgers State University of New Jersey, and the Research
+  Foundation of State University of New York at Stony Brook under
+  United States of America Serial No. 11/760379 and to the patents
+  and/or patent applications resulting from it.
+
+PATENT MARKING NOTICE:
+
+  This software is covered by US Patent No. 8,185,551.
+  This software is covered by US Patent No. 8,489,638.
+
+PATENT RIGHTS GRANT:
+
+  "THIS IMPLEMENTATION" means the copyrightable works distributed by
+  Tokutek as part of the Fractal Tree project.
+
+  "PATENT CLAIMS" means the claims of patents that are owned or
+  licensable by Tokutek, both currently or in the future; and that in
+  the absence of this license would be infringed by THIS
+  IMPLEMENTATION or by using or running THIS IMPLEMENTATION.
+
+  "PATENT CHALLENGE" shall mean a challenge to the validity,
+  patentability, enforceability and/or non-infringement of any of the
+  PATENT CLAIMS or otherwise opposing any of the PATENT CLAIMS.
+
+  Tokutek hereby grants to you, for the term and geographical scope of
+  the PATENT CLAIMS, a non-exclusive, no-charge, royalty-free,
+  irrevocable (except as stated in this section) patent license to
+  make, have made, use, offer to sell, sell, import, transfer, and
+  otherwise run, modify, and propagate the contents of THIS
+  IMPLEMENTATION, where such license applies only to the PATENT
+  CLAIMS.  This grant does not include claims that would be infringed
+  only as a consequence of further modifications of THIS
+  IMPLEMENTATION.  If you or your agent or licensee institute or order
+  or agree to the institution of patent litigation against any entity
+  (including a cross-claim or counterclaim in a lawsuit) alleging that
+  THIS IMPLEMENTATION constitutes direct or contributory patent
+  infringement, or inducement of patent infringement, then any rights
+  granted to you under this License shall terminate as of the date
+  such litigation is filed.  If you or your agent or exclusive
+  licensee institute or order or agree to the institution of a PATENT
+  CHALLENGE, then Tokutek may terminate any rights granted to you
+  under this License.
+*/
+
+#ident "Copyright (c) 2007-2013 Tokutek Inc.  All rights reserved."
+#ident "The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it."
+
+#include <stdio.h>
+#include "locktree.h"
+#include "test.h"
+
+// ensure that small transactions do not get stalled by a big transaction that has lots of locks
+// ./locktree_escalation_big7_small1 --stalls 100 --max_lock_memory 1000000000 --verbose
+
+using namespace toku;
+
+static int verbose = 0;
+static int killed = 0;
+static pthread_t big_id, small_id;
+
+static void locktree_release_lock(locktree *lt, TXNID txn_id, int64_t left_k, int64_t right_k) {
+    range_buffer buffer;
+    buffer.create();
+    DBT left; toku_fill_dbt(&left, &left_k, sizeof left_k);
+    DBT right; toku_fill_dbt(&right, &right_k, sizeof right_k);
+    buffer.append(&left, &right);
+    lt->release_locks(txn_id, &buffer);
+    buffer.destroy();
+}
+
+// grab a write range lock on int64 keys bounded by left_k and right_k
+static int locktree_write_lock(locktree *lt, TXNID txn_id, int64_t left_k, int64_t right_k, bool big_txn) {
+    DBT left; toku_fill_dbt(&left, &left_k, sizeof left_k);
+    DBT right; toku_fill_dbt(&right, &right_k, sizeof right_k);
+    return lt->acquire_write_lock(txn_id, &left, &right, nullptr, big_txn);
+}
+
+#if 0
+static locktree **big_txn_lt;
+static int n_big_txn_lt;
+
+static int get_locktrees_touched_by_txn(TXNID txn_id UU(), void *txn_extra UU(), locktree ***ret_locktrees, int *ret_num_locktrees) {
+    locktree **locktrees = (locktree **) toku_malloc(n_big_txn_lt * sizeof (locktree *));
+    for (int i = 0; i < n_big_txn_lt; i++)
+        locktrees[i] = big_txn_lt[i];
+    *ret_locktrees = locktrees;
+    *ret_num_locktrees = n_big_txn_lt;
+    return 0;
+}
+#endif
+
+static void run_big_txn(locktree::manager *mgr UU(), locktree **lt, int n_lt, TXNID txn_id) {
+    int64_t last_i = -1;
+    for (int64_t i = 0; !killed; i++) {
+        for (int j = 0; j < n_lt; j++) {
+            uint64_t t_start = toku_current_time_microsec();
+            int r = locktree_write_lock(lt[j], txn_id, i, i, true);
+            assert(r == 0);
+            last_i = i;
+            uint64_t t_end = toku_current_time_microsec();
+            uint64_t t_duration = t_end - t_start;
+            if (t_duration > 100000) {
+                printf("%u %s %" PRId64 " %" PRIu64 "\n", toku_os_gettid(), __FUNCTION__, i, t_duration);
+            }
+        }
+        toku_pthread_yield();
+    }
+    if (last_i != -1)
+        for (int j = 0; j < n_lt; j++)
+            locktree_release_lock(lt[j], txn_id, 0, last_i); // release the range 0 .. last_i
+    if (verbose)
+        printf("%u %s %" PRId64 "\n", toku_os_gettid(), __FUNCTION__, last_i);
+}
+
+struct big_arg {
+    locktree::manager *mgr;
+    locktree **lt;
+    int n_lt;
+    TXNID txn_id;
+};
+
+static void *big_f(void *_arg) {
+    struct big_arg *arg = (struct big_arg *) _arg;
+    assert(pthread_equal(pthread_self(), big_id));
+    printf("%u %s\n", toku_os_gettid(), __FUNCTION__);
+    run_big_txn(arg->mgr, arg->lt, arg->n_lt, arg->txn_id);
+    return arg;
+}
+
+static void run_small_txn(locktree::manager *mgr UU(), locktree *lt, TXNID txn_id, int64_t k) {
+    int64_t i;
+    for (i = 0; !killed; i++) {
+        uint64_t t_start = toku_current_time_microsec();
+        int r = locktree_write_lock(lt, txn_id, k, k, false);
+        assert(r == 0);
+        uint64_t t_end = toku_current_time_microsec();
+        uint64_t t_duration = t_end - t_start;
+        if (t_duration > 100000) {
+            printf("%u %s %" PRId64 " %" PRIu64 "\n", toku_os_gettid(), __FUNCTION__, i, t_duration);
+        }
+        locktree_release_lock(lt, txn_id, k, k);
+        toku_pthread_yield();
+    }
+    if (verbose)
+        printf("%u %s %" PRId64 "\n", toku_os_gettid(), __FUNCTION__, i);
+}
+
+struct small_arg {
+    locktree::manager *mgr;
+    locktree *lt;
+    TXNID txn_id;
+    int64_t k;
+};
+
+static void *small_f(void *_arg) {
+    struct small_arg *arg = (struct small_arg *) _arg;
+    printf("%u %s\n", toku_os_gettid(), __FUNCTION__);
+    run_small_txn(arg->mgr, arg->lt, arg->txn_id, arg->k);
+    return arg;
+}
+
+static void e_callback(TXNID txnid, const locktree *lt, const range_buffer &buffer, void *extra) {
+    assert(pthread_equal(pthread_self(), big_id));
+    if (verbose) 
+        printf("%u %s %" PRIu64 " %p %d %p\n", toku_os_gettid(), __FUNCTION__, txnid, lt, buffer.get_num_ranges(), extra);
+}
+
+static uint64_t get_escalation_count(locktree::manager &mgr) {
+    LTM_STATUS_S ltm_status;
+    mgr.get_status(&ltm_status);
+
+    TOKU_ENGINE_STATUS_ROW key_status = NULL;
+    // lookup keyname in status
+    for (int i = 0; ; i++) {
+        TOKU_ENGINE_STATUS_ROW status = &ltm_status.status[i];
+        if (status->keyname == NULL)
+            break;
+        if (strcmp(status->keyname, "LTM_ESCALATION_COUNT") == 0) {
+            key_status = status;
+            break;
+        }
+    }
+    assert(key_status);
+    return key_status->value.num;
+}
+
+int main(int argc, const char *argv[]) {
+    uint64_t stalls = 1;
+    int n_big = 7;
+    uint64_t max_lock_memory = 1000000;
+
+    for (int i = 1; i < argc; i++) {
+        if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) {
+            verbose++;
+            continue;
+        }
+        if (strcmp(argv[i], "--stalls") == 0 && i+1 < argc) {
+            stalls = atoll(argv[++i]);
+            continue;
+        }
+        if (strcmp(argv[i], "--max_lock_memory") == 0 && i+1 < argc) {
+            max_lock_memory = atoll(argv[++i]);
+            continue;
+        }
+    }
+
+    int r;
+
+    // create a manager
+    locktree::manager mgr;
+    mgr.create(nullptr, nullptr, e_callback, nullptr);
+    mgr.set_max_lock_memory(max_lock_memory);
+
+    // create lock trees
+    uint64_t next_dict_id = 1;
+    DICTIONARY_ID dict_id;
+    locktree *big_lt[n_big];
+    for (int i = 0; i < n_big; i++) {
+        dict_id = { next_dict_id }; next_dict_id++;
+        big_lt[i] = mgr.get_lt(dict_id, nullptr, compare_dbts, nullptr);
+    }
+
+#if 0
+    big_txn_lt = big_lt;
+    n_big_txn_lt = n_big;
+#endif
+
+    dict_id = { next_dict_id }; next_dict_id++;
+    locktree *small_lt = mgr.get_lt(dict_id, nullptr, compare_dbts, nullptr);
+
+    // create the worker threads
+    struct big_arg big_arg = { &mgr, big_lt, n_big, 1000 };
+    r = toku_pthread_create(&big_id, nullptr, big_f, &big_arg);
+    assert(r == 0);
+
+    struct small_arg small_arg = { &mgr, small_lt, 2000, 0 };    
+    r = toku_pthread_create(&small_id, nullptr, small_f, &small_arg);
+    assert(r == 0);
+
+    // wait for some escalations to occur
+    while (get_escalation_count(mgr) < stalls) {
+        sleep(1);
+    }
+    killed = 1;
+
+    // cleanup
+    void *ret;
+    r = toku_pthread_join(big_id, &ret);
+    assert(r == 0);
+
+    r = toku_pthread_join(small_id, &ret);
+    assert(r == 0);
+
+    for (int i = 0; i < n_big; i++)
+        mgr.release_lt(big_lt[i]);
+    mgr.release_lt(small_lt);
+    mgr.destroy();
+
+    return 0;
+}