When I queried `system.metrics` table, I found some negative values which hint to some potential internal overflows.

```
SELECT *
FROM system.metrics
FORMAT Vertical

...

Row 31:
───────
metric:      MemoryTrackingInBackgroundProcessingPool
value:       -580863171
description: Total amount of memory (bytes) allocated in background processing pool (that is dedicated for backround merges, mutations and fetches). Note that this value may include a drift when the memory was allocated in a context of background processing pool and freed in other context or vice-versa. This happens naturally due to caches for tables indexes and doesn't indicate memory leaks.

Row 32:
───────
metric:      MemoryTrackingInBackgroundMoveProcessingPool
value:       0
description: Total amount of memory (bytes) allocated in background processing pool (that is dedicated for backround moves). Note that this value may include a drift when the memory was allocated in a context of background processing pool and freed in other context or vice-versa. This happens naturally due to caches for tables indexes and doesn't indicate memory leaks.

Row 33:
───────
metric:      MemoryTrackingInBackgroundSchedulePool
value:       -4461308831
description: Total amount of memory (bytes) allocated in background schedule pool (that is dedicated for bookkeeping tasks of Replicated tables).

...

56 rows in set. Elapsed: 0.003 sec.
```

Server version: 20.8.2.3.
{
    for (auto & [disk_name, disk] : getDisksMap())
    {
        LOG_INFO(shared->log, "Shutdown disk {}", disk_name);
        disk->shutdown();
    }
    shared->shutdown();
}
Context::ApplicationType Context::getApplicationType() const
{
    return shared->application_type;
}
void Context::setApplicationType(ApplicationType type)
{
    
    shared->application_type = type;
}
void Context::setDefaultProfiles(const Poco::Util::AbstractConfiguration & config)
{
    shared->default_profile_name = config.getString("default_profile", "default");
    getAccessControlManager().setDefaultProfileName(shared->default_profile_name);
    shared->system_profile_name = config.getString("system_profile", shared->default_profile_name);
    setProfile(shared->system_profile_name);
}
String Context::getDefaultProfileName() const