On 6/8/2021, starting around 12:00pm Eastern, Cortext server monitoring showed an increase in processing of queue and sessions. The increased load had a downstream impact on database processing which led to much longer reconnection time for the clients. This affected user sign ins, messaging and status changes in all Cortext clients. The team quickly added additional authentication nodes but that only helped for little while before the service degraded again. As the team continued to look through logs and metrics, one of the SQL queries related to Directories was discovered as running extremely slowly. It was determined that the SQL table was corrupted and was rebuilt, which cleared the problem around 6:45p Eastern. Additional monitoring of SQL logs to alert potential slow queries are enabled.