Resolution:
Question:
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Is there a configuration option available which sets an upper limit for EMS datastores for EMS instance? Can we limit these datastore files to grow up to certain size?

Answer:
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There is no limitation on the datastore file size for 32 and/or 64-bit EMS servers. These files can grow to an extent of the free space available in a hard drive. The maximum datastore file size is determined by the operating system (OS) and the file system.

The EMS server relies on the max_msg_memory and/or reserve_memory properties to be set appropriately in order to prevent datastore files from growing too large. Also, even if there are very few pending messages in a datastore files, the file size may be proportionately larger. This situation arises when the data in the datastore files is fragmented. A large fragmented datastore file may adversely impact EMS performance. We recommend enabling store_truncate parameter in EMS server’s main config file (default tibemsd.conf) and schedule periodic compact on datastores during regular maintenance downtime, off-business hours or when there is very less load on the server. The compact command blocks all EMS operations.