ObjectDB Database Search

I'm not sure yet if this is a bug, however the number of OBD-StoreHandler threads seems to be growing over time.  The database JVM now has about ~500 active threads total, most of them titled OBD-StoreHandler.  What causes the creation of new OBD-StoreHandler threads? 

( setMaxResults ). Does that number affect? You may try running the query with a lazy fetch hint (as done by

large numbers of records

order by string with numbers

day of the month, numbered from 1. Since: Jakarta Persistence (JPA) 1.0 MONTH The calendar month of the year, numbered from 1. Since: Jakarta Persistence (JPA) 1.0 QUARTER The calendar quarter, numbered from 1 to 4. Since: Jakarta Persistence (JPA) 1.0 WEEK The ISO-8601 week number . Since: Jakarta

of the day in 24-hour time, numbered from 0 to 23. Since: Jakarta Persistence (JPA) 1.0 MINUTE The minute of the hour, numbered from 0 to 59. Since: Jakarta Persistence (JPA) 1.0 SECOND The second of the minute, numbered from 0 to 59, including a fractional part representing fractions of a second

field or property holds a version number or timestamp identifying the revision of the entity data ... .LocalDateTime . This field declares a version number : @Version @Column(name = "REVISION") protected

should be inferred. Since: Jakarta Persistence (JPA) 1.0 int secondPrecision () (Optional) The number of decimal ... be stored in a time column, or that the maximum number of digits supported by the database and JDBC

are found with field type GOOD. There are 2 ways generate the bug: Immediately after a new number ... number is printed. There is a 1 minute delay set. The same as 1, but keep ObjectDB's connection open. In this case rerunning the project many times doesn't help at all. Problem: the number of entities

we can see that most of the requests get stuck in one of 2 places: com.objectdb.o.PGC:w: line number 232 com.objectdb.o.LFL:U: line number 1068 Please see the attached callgraph examples for full stack ... The first stack trace (com.objectdb.o.LFL:U: line number 1068 ) indicates massive access

Jakarta Persistence (JPA) Method in jakarta.persistence.TypedQuery TypedQuery setMaxResults (    int maxResult ) Set the maximum number of results to retrieve. Parameters: maxResult - maximum number of results to retrieve Returns: the same query instance. Throws: IllegalArgumentException

argument rounded to the number of decimal places given by the second argument. Parameters: x - base n - number of decimal places Returns: the rounded value. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression toLong (    Expression number ) Typecast. Returns same expression object. Parameters: number - numeric expression Returns: Expression . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression toBigInteger (    Expression number ) Typecast. Returns same expression object. Parameters: number - numeric expression Returns: Expression . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression toInteger (    Expression number ) Typecast. Returns same expression object. Parameters: number - numeric expression Returns: Expression . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression toFloat (    Expression number ) Typecast. Returns same expression object. Parameters: number - numeric expression Returns: Expression . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression toDouble (    Expression number ) Typecast. Returns same expression object. Parameters: number - numeric expression Returns: Expression . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression toBigDecimal (    Expression number ) Typecast. Returns same expression object. Parameters: number - numeric expression Returns: Expression . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Column int secondPrecision() (Optional) The number of decimal digits to use for storing fractional seconds in a SQL time or timestamp column ... seconds should not be stored in a time column, or that the maximum number of digits supported by

Jakarta Persistence (JPA) Method in jakarta.persistence.Query Query setMaxResults (    int maxResult ) Set the maximum number of results to retrieve. Parameters: maxResult - maximum number of results to retrieve Returns: the same query instance. Throws: IllegalArgumentException

Jakarta Persistence (JPA) Method in jakarta.persistence.Query int getMaxResults() The maximum number of results the query object was set to retrieve. Returns Integer#MAX_VALUE if Query.setMaxResults was not applied to the query object. Returns: maximum number of results. Since: Jakarta Persistence (JPA) 2.0

; } @Entity public class PhoneNumber { @Id int number ; @ManyToMany(mappedBy = "contactInfo.phoneNumbers

sequence numbers from the sequence. Since: Jakarta Persistence (JPA) 1.0 String catalog

) The amount to increment by when allocating id numbers from the generator. Since: Jakarta Persistence (JPA

my application and I want to add a person with the same national number as a person already in the database ... with the same national number as a person I want to add. However when I change the value of the national number in the database explorer when the program is running and I want to recreate the person, he keeps

tree with all the instances of a specific class. This is because numbering all the instances ... the maximum number of records 'N' (default to some small number like 10) to display ... , but they may contain collections (explicit or derived) with a large number of elements. Again, most likely I'm

the ObjectDB Server process has 3895 opened files, and from that number  3823 are opened sockets ... (firstdb and seconddb) and on the end of the line I wrote number of sockets, which ObjectDB Server ... . Number of opened sockets during the time: Thu Apr 15 15:11:01 CEST 2021 : 0 Thu Apr 15 19:03:01

, float) [2]     7  return       Line numbers :         ... .UNM$f [3]     4  areturn       Line numbers :         ... ;   Line numbers :         [pc: 0, line: 77]         [pc: 10

number ;   Which is a part of Customer object: @MappedSuperclass @NamedQueries({     ... (PhoneNumber number ){     principal = number ; }   And making a query: Customer customer ...         number | long | 4567890   Then I'm constructing exactly

Jakarta Persistence (JPA) Method in jakarta.persistence.TypedQuery TypedQuery setFirstResult (    int startPosition ) Set the position of the first result to retrieve. Parameters: startPosition - position of the first result, numbered from 0 Returns: the same query instance. Throws

Jakarta Persistence (JPA) Method in jakarta.persistence.TableGenerator int allocationSize() (Optional) The amount to increment by when allocating id numbers from the generator. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.criteria.CriteriaBuilder Expression exp (    Expression x ) Create an expression that returns the exponential of its argument, that is, Euler's number e raised to the power of its argument. Parameters: x - expression Returns: exponential. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateField MONTH The calendar month of the year, numbered from 1. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateField WEEK The ISO-8601 week number . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateField DAY The calendar day of the month, numbered from 1. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateField QUARTER The calendar quarter, numbered from 1 to 4. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField QUARTER The calendar quarter, numbered from 1 to 4. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField MONTH The calendar month of the year, numbered from 1. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField WEEK The ISO-8601 week number . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField DAY The calendar day of the month, numbered from 1. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField HOUR The hour of the day in 24-hour time, numbered from 0 to 23. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField MINUTE The minute of the hour, numbered from 0 to 59. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalDateTimeField SECOND The second of the minute, numbered from 0 to 59, including a fractional part representing fractions of a second Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalTimeField HOUR The hour of the day in 24-hour time, numbered from 0 to 23. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalTimeField MINUTE The minute of the hour, numbered from 0 to 59. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Field in jakarta.persistence.criteria.LocalTimeField SECOND The second of the minute, numbered from 0 to 59, including a fractional part representing fractions of a second Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.SequenceGenerator int allocationSize() (Optional) The amount to increment by when allocating sequence numbers from the sequence. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.Query int executeUpdate() Execute an update or delete statement. Returns: the number of entities updated or deleted. Throws: IllegalStateException - if called for a Jakarta Persistence query language SELECT statement or for a criteria query

Jakarta Persistence (JPA) Method in jakarta.persistence.Query Query setFirstResult (    int startPosition ) Set the position of the first result to retrieve. Parameters: startPosition - position of the first result, numbered from 0 Returns: the same query instance. Throws

stringValue; } The number of MyStep elements can reach over a million, the number of MyValue objects ... . One is to stupidly commit the transaction after a certain number of read accesses (every 10000 read access ... ;this operation or at least useful information about the number of instances in the heap per type