crontab pour autovacuum postgres

il faudra utiliser effectivement la crontab

il est conseillé de l'ééditer avec la commande suivant

Code:

crontab -e

le format est à respecter

Code:

minutes heure n°dujourdanslemoi moi n+dujourdanslasemaine user chemin/commande

un exemple :

Code:

1 2 3 4 1-5 root /usr/bin/blague_pourrie_au_employees.sh

declanchera à 01:02 le 3/mars ou ça tombe un lundi,mardi,mercredi,jeudi ou vendredi l'envoi de mail blague_pourrie

details :

Code:

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       Commands are executed by cron(8) when the minute, hour, and month of year fields match the current time, and when at least  one  of
       the  two day fields (day of month, or day of week) match the current time (see ‘‘Note’’ below).  cron(8) examines cron entries once
       every minute.  The time and date fields are:
 
              field          allowed values
              -----          --------------
              minute         0-59
              hour           0-23
              day of month   1-31
              month          1-12 (or names, see below)
              day of week    0-7 (0 or 7 is Sun, or use names)
 
       A field may be an asterisk (*), which always stands for ‘‘first-last’’.
 
       Ranges of numbers are allowed.  Ranges are two numbers separated with a hyphen.  The specified range is  inclusive.   For  example,
       8-11 for an ‘‘hours’’ entry specifies execution at hours 8, 9, 10 and 11.
 
       Lists are allowed.  A list is a set of numbers (or ranges) separated by commas.  Examples: ‘‘1,2,5,9’’, ‘‘0-4,8-12’’.
 
       Step  values  can  be  used in conjunction with ranges.  Following a range with ‘‘/<number>’’ specifies skips of the number’s value
       through the range.  For example, ‘‘0-23/2’’ can be used in the hours field to specify  command  execution  every  other  hour  (the
       alternative  in the V7 standard is ‘‘0,2,4,6,8,10,12,14,16,18,20,22’’).  Steps are also permitted after an asterisk, so if you want
       to say ‘‘every two hours’’, just use ‘‘*/2’’.