Hi, Sorry. My english is not good :)
The size default for qmail log is 98026 bytes and only 10 files. I changed to 998016 bytes (984K) and 100 files. I made this change for running isoqlog only once per day. 30 22 * * * root /usr/local/bin/isoqlog 1>/dev/null 2>/dev/null Which the better performance? Log size big and execute once per day the isoqlog 30 22 * * * root /usr/local/bin/isoqlog 1>/dev/null 2>/dev/null Or log size default and execute many times the isoqlog */5 */5 * * * * root /usr/local/bin/isoqlog 1>/dev/null 2>/dev/null Thank you Joao