On 2018-Jun-08, Miguel Angel Sanchez Sandoval wrote: > Hi guys, migrate from 8.4 to 9.5, all OK except that 2-3 days pass and the > database experiences slowness, I execute the linux top command and it shows > me a postgres user process executing a strange command (2yhdgrfrt63788) > that I consume a lot of CPU, I see the querys active and encounter select > fun ('./ 2yhdgrfrt63788') , this did not happen in version 8.4, any help > would appreciate it. Hmm, has your database been compromised? You may have an intruder there -- beware. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services