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What about a tool that gather some statistics from all users cron(ie)tab
files and show them on a public (or for logged-in users only)
page/place.
The idea is that user can get an clue on what times have high or low job
loads.
Something like:
00 - used xx times - xx% of all jobs
01 - used xx times - xx% of all jobs
02 - ...
03
Might also include hours and more info, BUT NO per user data just
overall averages and counts.
Greetings
DrTrigon
On 13.09.2012 22:59, DaB. wrote:
Hello all,
a few users contacted me about their not running cron-tasks. A
often found problem is, that the cron-lines of these user are like
the following:
0 0 * * * DoSomething
or
0 * * * * DoSomething
In a ideal world that would be no problem, but in real world that
CAN be a problem. Why? Because many users have the same idea and
our submit-hosts fail than with
(CRON) CAN'T FORK (child_process): Not enough space.
Last night 41 tasks were successful started at midnight, an unknown
number failed. Of course we could just hit the problem with buying
new hardware, but most time of the day these hosts do idle. So how
to solve this problem? It's easy: Spread the load. Most times a
task (like a bot) do not care if it is started a few minutes
earlier or later. So choose a minute that is unlike 0 and not
divisible without remainder by 5. If it really does not matter for
you when your task starts, then take the position of the first
letter of your user-name and add 2 ("dab" ? "d" ? 4 ? 6). To not
produce a misunderstanding: If your task REALLY needs to start at
minute 0 (or at midnight): do it. An of course cron-tasks are
failing for other reasons to, so contact me (jira-bug preferred) if
you have a problem.
Sincerely, DaB.
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