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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Distributed data
Multiphase commit protocols
Configuration parameters used in two-phase commits
Function of the DEADLOCK_TIMEOUT parameter

Function of the DEADLOCK_TIMEOUT parameter

If a distributed transaction is forced to wait longer than the number of seconds specified by DEADLOCK_TIMEOUT for a shared-memory resource, the thread that owns the transaction assumes that a multiserver deadlock exists. The following error message is returned:

-154 ISAM error: deadlock timeout expired - Possible deadlock.

The default value of DEADLOCK_TIMEOUT is 60 seconds. Adjust this value carefully. If you set it too low, individual database servers end transactions that are not deadlocks. If you set it too high, multiserver deadlocks might reduce concurrency.