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ZIM Programs and Utilities

Datablock Timeout

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This option is not used by Zim Server and might be removed in future releases.

datablock timeout milliseconds

The time milliseconds indicates how long a buffer is going to stay in memory before Zim Server can use it to make additional room for new buffers being read.

When a Zim session make a request to Zim Server to read a particular block of data, depending on the configuration option Blocks Per Read, more than one block can be read and stored in memory buffers, all in the same operation because a physical read operation brings more than one block at a time.

If, sometime later, these additional buffers are required for subsequent operations, these blocks will be found in memory thus saving physical read operations. However, because they can take space from useful blocks, they are marked to expire in the next milliseconds set by this configuration option.

This very same mechanism happens when a transaction is either committed or aborted. In these cases, if a particular buffer is no longer used after the commit or the abort, then the corresponding buffer is also marked to expire as above.

The smaller the number of milliseconds, the faster a buffer can be released from memory in case of need. This is particularly interesting for very active applications or for small number of Maximum Data Blocks.

Valid Settings

Range between 0 to 60.





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