The sybsystemdb database stores information about distributed transactions.
SAP ASE versions 12.0 and later can provide transaction coordination services for transactions that are propagated to remote servers using remote procedure calls (RPCs) or Component Integration System (CIS). Information about remote servers participating in distributed transactions is stored in the syscoordinations table.
The sybsystemdb database also stores information about SYB2PC transactions that use the SAP two-phase commit protocol. The spt_committab table, which stores information about and tracks the completion status of each two-phase commit transaction, is stored in the sybsystemdb database.
See the Configuration Guide for your platform for information about two-phase commit transactions and how to create the sybsystemdb database.