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Update database resize behavior 

On an existing database, don't set LMDB map size to be the initial size
for a new database.

Check if resize is needed at startup.
This commit is contained in:
warptangent 2015-05-30 07:48:16 -07:00
parent f85cd8e10b
commit f37ee2f304
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1 changed files with 20 additions and 2 deletions
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22
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -822,11 +822,29 @@ void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
throw0(DB_ERROR("Failed to set max number of dbs"));
size_t mapsize = DEFAULT_MAPSIZE;
if (auto result = mdb_env_set_mapsize(m_env, mapsize))
throw0(DB_ERROR(std::string("Failed to set max memory map size: ").append(mdb_strerror(result)).c_str()));
if (auto result = mdb_env_open(m_env, filename.c_str(), mdb_flags, 0644))
throw0(DB_ERROR(std::string("Failed to open lmdb environment: ").append(mdb_strerror(result)).c_str()));
MDB_envinfo mei;
mdb_env_info(m_env, &mei);
uint64_t cur_mapsize = (double)mei.me_mapsize;
if (cur_mapsize < mapsize)
{
if (auto result = mdb_env_set_mapsize(m_env, mapsize))
throw0(DB_ERROR(std::string("Failed to set max memory map size: ").append(mdb_strerror(result)).c_str()));
mdb_env_info(m_env, &mei);
cur_mapsize = (double)mei.me_mapsize;
LOG_PRINT_L1("LMDB memory map size: " << cur_mapsize);
}
if (need_resize())
{
LOG_PRINT_L0("LMDB memory map needs resized, doing that now.");
do_resize();
}
int txn_flags = 0;
if (mdb_flags & MDB_RDONLY)
txn_flags |= MDB_RDONLY;