**Describe the bug**

Since we upgraded to 20.10.3.30, one of our clickhouse cluster takes much more time to start. (Up to 50 minutes, and before it took ~3 minutes)
The log file is filled with
>  <Debug> DiskLocal: Reserving 1.00 MiB on disk `default`, having unreserved 16.90 TiB

Additionally, the memory consumption increases, linearly, a lot (up to arround 230 G for us) and then drop back to normal values once clickhouse finished starting up. During that loading phase, a single CPU core is used at 100%.
If that memory is not available for the machine, clickhouse gets OOMed by the kernel.


**How to reproduce**
* Issue appeared after we upgraded to ClickHouse server version 20.10.3.30

* How could I find wich of our tables may be responsible for that ?


**Expected behavior**
A fast startup :)

throw Exception(ErrorCodes::LOGICAL_ERROR, "Data part {} is Outdated and has creation TID {} and CSN {}, "
                            "but does not have removal tid. It's a bug or a result of manual intervention.",
                            part->name, part->version.creation_tid, creation_csn);
        }
        modifyPartState(it, DataPartState::Outdated);
        removePartContributionToDataVolume(part);
        
        
        if (!part->version.isRemovalTIDLocked())
        {
            TransactionInfoContext transaction_context{getStorageID(), part->name};
            part->version.lockRemovalTID(Tx::PrehistoricTID, transaction_context);
        }
    };
    
    assert(std::find_if(data_parts_by_state_and_info.begin(), data_parts_by_state_and_info.end(),
    [](const auto & part)
    {
        return part->getState() != DataPartState::Active;
    }) == data_parts_by_state_and_info.end());
    bool have_parts_with_version_metadata = false;
    auto iter = data_parts_by_state_and_info.begin();
    while (iter != data_parts_by_state_and_info.end() && (*iter)->getState() == DataPartState::Active)
    {
        const DataPartPtr & part = *iter;
        part->loadVersionMetadata();
        VersionMetadata & version = part->version;
        if (part->wasInvolvedInTransaction())
        {