Error trying to use GetValues() from DataReader. Falling back to individual field reads

ServiceStack.OrmLite
1

Using .NET Core and ORM.Lite MySQL, getting this warning every once in a while. It’s not consistent, will reappear every now and again and then go away (results return common items then rollover every few hours). Wondering what could cause this and if there’s anything I can do to fix it.

warn: ServiceStack.OrmLite.OrmLiteWriteCommandExtensions[0]
  Error trying to use GetValues() from DataReader. Falling back to individual field reads...
2

It’s caused by the MySql ADO.NET provider when trying to read the row using ADO.NET’s batch GetValues() API, you can set:

OrmLiteConfig.DeoptimizeReader = true;

So it never tries to use the batch API.

3

Will this degrade performance at all?

4

Potentially, but using the individual column APIs are the most popular APIs that most ORM’s use.