I noticed what I believe may be a handle leak against the latest (commit 7b9928c) on github, with the MDB_VL32 on Windows. After some poking around, it seems to be the file mapping handle, env->me_fmh. I threw it to a CloseHandle in the env_close0(…) and it seemed to resolve it.
Here’s a quick diff:
diff --git a/src/lmdb.c b/src/mdb.c index a564d40..190c860 100644 --- a/src/mdb.c +++ b/src/mdb.c @@ -5350,6 +5350,7 @@ mdb_env_close0(MDB_env *env, int excl) } #ifdef MDB_VL32 #ifdef _WIN32 + if (env->me_fmh) CloseHandle(env->me_fmh); if (env->me_rpmutex) CloseHandle(env->me_rpmutex); #else pthread_mutex_destroy(&env->me_rpmutex);