TurboIMAGE/XL Database Management System Reference Manual MPE/iX V6.5 (30391-90011)

490 Chapter10
Internal Structures and Techniques
System Limits
Table 10-1. Static System Limits
Resource Limit
Opened databases / system 2004
Data items / database 1023
Data sets / database 199
Passwords / database 63
Data items / data set 255
Paths / data set 16
No. of chunks / data set 99
Locked item / data set 1
Data entries / data set 2 ** 31 – 1
Data entries / chain 2 ** 31 – 1
DBOPENs / process 127
DBOPENs / process / database 63
Remote DBOPENs / process 127
Remote DBOPENs process / database 63
Sub item count / item 255
Sub item length 510 bytes
Item length 4096 bytes
Entry length 4756 bytes
Block length 5120 bytes
Data set size 80 GB
Databases / transaction 15
Lock descriptors size / DBLOCK 4096 bytes
Dynamic transaction size / process 4MB
Dynamic transaction size / volume set 64MB
B-tree index key size 252 bytes