SuperLinux Encyclopedia - Linux Specifications, & Limits

Limits:

• Max RAM: Just over 1Gb for 2.0.x kernels, more for 2.1.x kernels. (source: newsgroup)
• Max Number of processes: 30000, but effectively limited by available memory. (source: newsgroup)
• Max ext2 filesize: 2 GB. (source: several newsgroup articles) Some patches for larger on 64-bit computers.
• Max ext2 partitions size: 4 TB according to one newsgroup article but another said the drives (independent of filesystem) can only handle 2 TB under Linux.
• Max files+directories per partition: Number of "inodes" made at filesystem creation (mkfs) time. Default is (?) one inode per 4K. Limit is (?) one inode per 1K. (source: one newsgroup article)
• Max files/dir: No limit except poor performance. (source: one newsgroup article)

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