waltercool

Backup: pg_dump -Fc -f /path/to/backup.dump

Restore: pg_restore -U <USER> -h <HOST> -d <DATABASE> -Fc -Oxc backup.dump

waltercool

from peewee import *

class BModel(Model):
    class Meta:
        database = db

    @classmethod
    def create_table(cls, *args, **kwargs):
        for field in cls._meta.get_fields():
            if hasattr(field, "pre_field_create"):

waltercool

-- show running queries (pre 9.2)
SELECT procpid, age(query_start, clock_timestamp()), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(query_start, clock_timestamp()), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

waltercool

1. Stopping a zombie machine: aws opsworks stop-instance --instance-id <opsworks ID>

2. Resize root disk on AWS:
   z) partprobe /dev/xvdX
   a) parted /dev/xvdX print
   b) parted /dev/xvdX resizepart Y && resize2fs /dev/xvdXY # resize2fs needed to update the partition table

Update for xfs partitions:

a) growpart /dev/xvda 1