System Limits
| Number of Databases/Users | 4.2 Billion |
| Message length | 1 MB |
| SQL request length | 1 MB |
| Number of Active transactions | 2,048 |
| Data Parcel Length | 65,104 |
| Parcels in one message | 256 |
| SQL title length | 60 |
| String constant length | 255 |
| Data Format Descriptor Length | 30 |
| Error message text in failure parcel | 255 |
| Sessions per gateway (Max 1 gateway / Node) | 1,200 |
| Sessions per PE | 120 |
| Concurrent Utility jobs | 15 |
| Vprocs per system | 16,384 |
| Vprocs per Node | 128 |
| Data capacity per AMP - Unformatted | 1.3 Tbyte |
Database Limits
| Tables per database | 32,000 |
| Journal tables per database | 1 |
| Columns per table | 2,048 |
| LOB columns per table | 32 |
| Columns per View / Spool file | 512 |
| Block Size | 130,560 |
| Row size (approx) | 64,256 |
| Column size (approx) | 64,000 |
| LOB size | 2 GB |
| Column / Table name length | 30 |
| Number of columns per index | 62 |
| Secondary / Join indexes per table | 32 |
| Table level constraints per table | 100 |
| Referential constraints per table | 64 |
| Tables that can reference a table | 64 |
| Columns in Foreign & Parent key | 16 |
| View / Macro nesting levels | 8 |
| Rows per table | limited by space available |
Session Limits
| Spool Files | 2048 |
| Global Temporary Tables | 1000 |
| Volatile Temporary Tables | 2000 |
| Parallel steps performed ( If no channels) | 20 |
| Number of channels | 10
Redistribution across AMPs uses 4 channels
Non prime Index (without redistribution) uses 2 channels |
Developed from an Attachment provided by Mike Dempsey.
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