[Koha] safe way

hi list is it safe way to rebuild zebra by crontab every 1 or 5 mins to indexing my new records , i'm really worry about my catalig to losing my data when records become more 100.000 or 200.000 records , is it crontab safing to use it ? i know there are anther solution to indexing problem but i can't found it because i believe that koha an integrated system no way this problem in it .... so is crontab sae when records become 200.000 or more or any one have a perfect solution for indexing problem ..... thank's = mailing list very helpful