First ZSON should be*trained* on common data usingzson_learn procedure:

First ZSON should be*trained* on common data usingzson\_learn procedure:

This time*second* dictionary will be created. Dictionaries are cached in memory so it will take about a minute before ZSON realizes that there is a new dictionary. After that old documents will be decompressed using old dictionary and new documents will be compressed and decompressed using new dictionary.

To find out which dictionary is used for given ZSON document usezson_info procedure:

To find out which dictionary is used for given ZSON document usezson\_info procedure:

... i.e. average document size. When it suddenly starts to grow it's time to re-learn.

However, developers usually know when they change a schema significantly. It's also easy to re-check whether current schema differs a lot from the original usingzson_dict table.

However, developers usually know when they change a schema significantly. It's also easy to re-check whether current schema differs a lot from the original usingzson\_dict table.