| Metric | 32-bit (18.04) | 64-bit (20.04) | | :--- | :--- | :--- | | | ~85 MB | ~115 MB | | Syscall overhead | Slightly lower | Slightly higher | | Security features | Limited ASLR | Full NX/SMEP | | Disk I/O | Faster on spinning rust | Faster on SSDs |
Official 32-bit (i386) support for Ubuntu Server has been discontinued for all modern releases. The last version to provide a 32-bit installer was . ubuntu server 32 bit