Method prepOverwriteForSnapshot

src/db.cpp:2695–2710

This is a performance tool to prevent us copying over an object we're going to overwrite anyways

// This is a performance tool to prevent us copying over an object we're going to overwrite anyways
void redisDbPersistentData::prepOverwriteForSnapshot(char *key)
{
    if (g_pserver->maxmemory_policy & MAXMEMORY_FLAG_LFU)
        return;

    if (m_pdbSnapshot != nullptr)
    {
        auto itr = m_pdbSnapshot->find_cached_threadsafe(key);
        if (itr.key() != nullptr)
        {
            sds keyNew = sdsdupshared(itr.key());
            if (dictAdd(m_pdictTombstone, keyNew, (void*)dictHashKey(m_pdict, key)) != DICT_OK)
                sdsfree(keyNew);
        }
    }
}

void redisDbPersistentData::tryResize()
{