· Nov 18, 2019

The cachedb jounal sync takes a long time on my system. It takes about 4 minutes. How do I force journal to sync?

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.

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