Hi,
Using Bitcoin Core RPC client version v0.17.0.1-g1476554d3b1db5352c0de1de7524864d4bce3aac

I'm using bitcoin-cli loadwallet and unloadwallet commands. They both seem to work fine.
Unfortunately, memory is getting higher and higher, and no wallet can be loaded after 300 have been.
The problem may be related to BerkeleyDB rather than to Bitcoin Core itself. Fact is that lsof shows handles not cleared off after the unloadwallet command is issued. Files still handled are .walletlock, db.log and database/log.0000000001 .
When 300 different wallets have been loaded/unloaded, used RAM is over 8 GB, and bitcoind will finally become unstable and fail.

Any help would be appreciated.
Regards,
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            }
            for (const std::string& to_include : includeconf) {
                fprintf(stderr, "warning: -includeconf cannot be used from included files; ignoring -includeconf=%s\n", to_include.c_str());
            }
        }
    }
    
    ClearDatadirCache();
    if (!fs::is_directory(GetDataDir(false))) {
        error = strprintf("specified data directory \"%s\" does not exist.", gArgs.GetArg("-datadir", "").c_str());
        return false;
    }
    return true;
}
std::string ArgsManager::GetChainName() const
{
    LOCK(cs_args);
    bool fRegTest = ArgsManagerHelper::GetNetBoolArg(*this, "-regtest");
    bool fTestNet = ArgsManagerHelper::GetNetBoolArg(*this, "-testnet");
    if (fTestNet && fRegTest)
        throw std::runtime_error("Invalid combination of -regtest and -testnet.");
    if (fRegTest)
        return CBaseChainParams::REGTEST;
    if (fTestNet)
        return CBaseChainParams::TESTNET;
    return CBaseChainParams::MAIN;
}
#ifndef WIN32
fs::path GetPidFile()