Mac OS X Server 10.2: Tested and Theoretical Maximums (Limits)
The table below lists the tested and theoretical maximums (limits) for services offered by Mac OS X Server 10.2 or later.
This article has been archived and is no longer updated by Apple.
Note: Tested maximums reflect the test configuration and do not represent a guarantee of performance. Your experience may vary depending on factors such as computer model, microprocessor speed, network conditions, hard disk space, disk fragmentation, installed memory (RAM), client load, total number of services running on the server, or other software used on the server. Information left blank in the table is not yet available.
Tested and Theoretical Maximums
| Component | Maximum | Tested | Theoretical |
| Core OS | Number of Open Files | 1000 | 12288 |
| AFP Server | Number of Connected Users | 1000 | N/A |
| User Accounts | User Comments Character Limit | 54662 | N/A |
| Directory Services | Number of Groups per User | 16 | 16 |
| Directory Services | Number of Groups | 10000 | |
| Directory Services | Number of Users | 10000 | |
| AFP Server | Shareable Volume Size | 8 TB | 8 TB |
| AFP Server | Number of Files per Volume | 250 million | 2 147 483 646 |
| AFP Server | Number of Shared Items | 255 | 255 |
| Web Server | Number of Connected Users | 2048 | |
| SMB Server | Number of Open Files | 1000 | 12288 |
| SMB Server | Number of Connected Users | 1000 | 1000 |
| Mail Server | Number of Incoming SMTP Connections | 512 | |
| Mail Server | Number of Outgoing SMTP Connections | 256 | |
| Mail Server | Number of POP Connections | 1024 | |
| Mail Server | Number of IMAP Connections | 1024 | |
| Mail Server | Maximum Size of Mail Database | 128 GB | |
| Mail Server | Number of Messages in Mail Database | 4 billion | |
| FTP Server | Number of Connected Users | 16384 | |
| FTP Server | Maximun no. of Connections per User | 16384 | |
| Web Server | Number of Open Files | 12288 | |
| QTSS | Number of Connected Users per Streamed File | 12288 | |
| QTSS | Number of Simultaneously Streamed Files | 12288 | |
| QTSS | Number of Connected Users | 12288 | |
| Print Server | Number of Queues | 60 | |
| Macintosh Manager Client | Number of Approved Desktop Printers Per Workgroup | 5 | 10 |
| NetBoot | Number of Clients Simultaneously Using NetBoot | 50 | |
| Mail Server | Number of Entries in SMTP Server Rejection List | 128 | N/A |
| Mail Server | Number of Entries in Approved SMTP Hosts List | 128 | N/A |
Last Modified: Feb 17, 2012