Under Tools > CDR Management, you get a general parameters section.
I'm pasting this from the help guide on a 11.5 CUCM, 110 GB HDD
Disk Allocation (MB)
Choose the number of megabytes that you want to allocate to CDR and CMR flat file storage.
The default disk allocation and range vary depending on the size of the server hard drive.
Note
The maximum CAR database size equals 3328 MB for a Cisco Unified Communications Manager server.
If disk usage exceeds the allocated maximum disk space for CDR files, the system generates the CDRMaximumDiskSpaceExceeded alert and deletes all successfully processed files (those delivered to billing servers and loaded to CAR). If disk usage still exceeds the allocated disk space, the system deletes undelivered files and files within the preservation duration, starting with the oldest, until disk utilization falls below the high water mark.
If you have a large system and do not allocate enough disk space, the system may delete the CDR and CMR files before the CAR Scheduler loads the files into the CAR database. For example, if you configure the CAR Scheduler to run once a day and you set the disk allocation to a value that is not large enough to hold the CDR and CMR files that are generated in a day, the system will delete the files before they are loaded into the CAR database.
However the serviceability guide states depending on the HDD:
The maximum CAR database size equals 6 GB for a Cisco Unified Communications Manager server.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/service/11_0_1/admin/CUCM_BK_CF9AFC8E_00_cisco-unified-servicability-merge-1101/Tools_and_Reports.html
Please rate if you find this helpful.
Regards,
Aeby
Please rate if you find this helpful.
Regards,
Aeby
