my cachedb version:
Cache Running version:
Cache for UNIX (Red Hat Enterprise Linux for x86-64) 2017.1.1 (Build 111U_SU) Tue May 23 2017 13:39:47 EDT
The frequency with which the journal is synced depends on the operating circumstances of the InterSystems IRIS instance involved. A journal sync can be triggered:
- Once every two (2) seconds if the system is idle.
- In an ECP-based distributed cache cluster, by the data server when responding to specific requests (for example, $Increment) from the application servers to guarantee ECP semantics.
- By a TCOMMIT (in synchronous commit mode, which causes the data involved in that transaction to be flushed to disk) if you are using InterSystems IRIS transactions.
- As part of every database write cycle by the write daemon.
- When the journal buffer is full.