Hi,

I am having an OutOfMemoryException while upgrading a date field of several hundreds of thousands of entities in one transaction.

Code sample :

events = Query.All<Event>().Where(a => a.When != null);
foreach (var entity in events)
{
  entity.When = entity.When.Value.ToUniversalTime();
}

Context :

Dataobjects.Net 4.6.4.1531, the code is in an opened transaction which does many other upgrades but none will go out of memory.

Question :

Is this a bug or is there a better pattern to do this ? Can i use nested transaction for it ? Shall I call Session.Current.SaveChanges() every 100000 updated entities ?

Stacktrace :

System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
   at System.Collections.Generic.Dictionary`2.Resize(Int32 newSize, Boolean forceNewHashCodes)
   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
   at Xtensive.Caching.WeakCache`2.Add(TItem item, Boolean replaceIfExists)
   at Xtensive.Caching.LruCache`2.Clear()
   at Xtensive.Orm.Session.Dispose()
   at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.PerformUpgrade(Domain domain, UpgradeStage stage)
   at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.BuildMultistageDomain()
   at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.Run()
   at Xtensive.Orm.Upgrade.UpgradingDomainBuilder.Build(DomainConfiguration configuration)
   at Xtensive.Orm.Domain.Build(DomainConfiguration configuration)

Thanks,

Benoit