"status" values of table dbsnmp.caw_load_metadata ?

Due to i/o problems(solved now), my awr warehouse had fallen behind and is now trying to catch up.

Does anyone know, what the "status" values in dbsnmp.caw_load_metadata means (to better monitor/catch future problems).

SYS@awrdb>select status, count(*) from dbsnmp.caw_load_metadata group by status order by status;

Yesterday :

    STATUS   COUNT(*)
---------- ----------
         1       1345
         2          8
         3      11366
         4         27

This morning :

    STATUS   COUNT(*)
---------- ----------
         1       1268
         2          8
         3      11554
         4         31

Thanks in advance.

Lars Dohn