arangodb/Documentation/DocuBlocks/walPropertiesSet.md

@brief configures the write-ahead log internal.wal.properties(properties)

Configures the behavior of the write-ahead log. properties must be a JSON JSON object with the following attributes:

• allowOversizeEntries: whether or not operations that are bigger than a single logfile can be executed and stored
• logfileSize: the size of each write-ahead logfile
• historicLogfiles: the maximum number of historic logfiles to keep
• reserveLogfiles: the maximum number of reserve logfiles that ArangoDB allocates in the background
• throttleWait: the maximum wait time that operations will wait before they get aborted if case of write-throttling (in milliseconds)
• throttleWhenPending: the number of unprocessed garbage-collection operations that, when reached, will activate write-throttling. A value of 0 means that write-throttling will not be triggered.

Specifying any of the above attributes is optional. Not specified attributes will be ignored and the configuration for them will not be modified.

@EXAMPLES

@EXAMPLE_ARANGOSH_OUTPUT{WalPropertiesSet_mmfiles} | require("internal").wal.properties({ | allowOverSizeEntries: true, logfileSize: 32 * 1024 * 1024 }); @END_EXAMPLE_ARANGOSH_OUTPUT