Eu encontrei esta ferramenta chamada cronviz que mostrará uma representação gráfica de suas entradas no crontab.
trecho
You have a problem: something's causing performance issues on the application server between 1 and 4 AM, and the cron jobs seem a likely culprit.
Naturally, you eyeball your crontab to find out what's running during those hours.
Now you have two problems.
Over time, cron jobs accrete into an impenetrable, opaque mass of text. Trying to get a comprehensive sense of all the various run times, and finding patterns therein, can be exceedingly difficult. Crontabs are written for computers to interpret -- not humans.
Exemplo de captura de tela
