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1

Performance question

than "all objects with object.date > 1.1.1980"? Or doesn't this matter, using proper indexing? Thanks, Benjamin ... with object.date > 1.1.1980"? Or doesn't this matter, using proper indexing? Yes. Mirroring the date ... . If you keep the date only in the second entity class - at least define 2 indexes: one on the date
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1

Performance with large databases

whenever I run the populating application.  Is there typically a database size when indexes can no longer ... a larger database. Is fetching an object by the id faster than fetching by an indexed field, or ... access. Retrieval by an indexed field is usually composed of two steps: First finding the ID and then retrieval by ID. sjzlondon
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1

Query perfromance problem

ms Refreshing this page with any other column for index with @Index set on it, lowers this time do 1 ... to something else than id, but without @Index - results are more or less in middle at about 5-6 seconds
Issue
1

Server crash - Mismatch client-server protocol prefix

out-of-memory errors (although I'm running with -Xmx1024m) and some issues with a particular index ... the index and increasing the heap size (-Xmx1024m may not be sufficient). Do you still see this error message after eliminating the memory and index issues? Update: Apparently this exception
Issue
1

again merger missing logs + objectdb exception

of the the ObjectProperty instance is unclear. These query failed during reading of indexes rather than primary data and no corruption is currently found in indexes in the provided database (except number of entries, which is due to the missing ObjectProperty instance). Hopefully there is an index
Result
1

[ODB1] Chapter 4 - JDO Metadata

identity supported by ObjectDB. To enforce unique values in a field you can define a unique index as ... has effect only in index declarations, as explained in the next section. 4.5  Index Definition Querying a large extent without indexes may take a significant amount of time because it requires iteration
Result
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ObjectDB version 2.2.8

Version 2.2.8 Fixed a critical bug in extensive removal operations of large objects. Improved the performance of navigation through an inverse (mapped by) field if the owner field is indexed. Fixed ... disabled indexes. Fixed a Doctor bug in fixing old (< 2.0) database files. Fixed a temporary file
Result
1

ObjectDB version 2.4.0

composite indexes. Improved processing of queries with a large number of variables (issue #607 ... not using LIKE's ESCAPE when an index is used. Fixed a bug in parsing time literals in queries. Fixed
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ObjectDB version 2.6.5

in MEMBER OF queries on embedded objects. Fixed a bug in querying indexed nested embedded objects ... to clock change. Fixed a bug in indexing java.sql.Date fields during time / time zone change. Fixed a bug in detachment of embedded objects (if enabled).
Result
1

ObjectDB version 2.7.0

indexes. Fixed a NullPointerException in running the Doctor when new indexes have to be built (issue