Oracle Warning in Alert Log Regarding PGA_AGGREGATE_LIMIT
According to our database admins, this is a known ORACLE error since version 12. We have been advised to set pga_aggregate_limit to 0 in order to work around this problem. I haven't been able to test this thoroughly, but we haven't seen errors since changing this setting (using alter system, we haven't set the parameter in our database's [s]pfile).