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@ -34,6 +34,7 @@
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#include <cstring> // memcpy
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#include <random>
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#include "common/util.h"
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#include "cryptonote_basic/cryptonote_format_utils.h"
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#include "crypto/crypto.h"
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#include "profile_tools.h"
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@ -1129,6 +1130,11 @@ void BlockchainLMDB::open(const std::string& filename, const int db_flags)
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if ((result = mdb_env_set_maxdbs(m_env, 20)))
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throw0(DB_ERROR(lmdb_error("Failed to set max number of dbs: ", result).c_str()));
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int threads = tools::get_max_concurrency();
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if (threads > 110 && /* maxreaders default is 126, leave some slots for other read processes */
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(result = mdb_env_set_maxreaders(m_env, threads+16)))
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throw0(DB_ERROR(lmdb_error("Failed to set max number of readers: ", result).c_str()));
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size_t mapsize = DEFAULT_MAPSIZE;
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if (db_flags & DBF_FAST)
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