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17

Occasionally slow requests in load testing

. The system seems to destabilize for about 10-15 minutes and then it returns to normal. During these 10-15 minutes we get a lot of slow responses. Not all of the requests during these times are slow ... - around 25000 calls to the db per minute. This includes variety of read and update queries
17

Master database switching to read-only mode, possibly caused by slave failure

of events was: 13:20 - our monitoring reported GC time per minute on the SLAVE instance over 30 seconds. The GC time on the slave instance continued to grow rapidly until it reached almost 1 minute per minute, at which point the process is essentially hanging - see attached screenshot. 13:22:43 - 13:25:43
15

Unexpected exception during open the database

the database and keep it open longer? support Support The issue also occurs, if we wait 10 minutes before ... minutes before we close the database. Could please clarify if in this case the exception is also thrown after 10 minutes, immediately after closing the database? support Support The exception is thrown
15

ObjectDB is opening too many sockets

creating sockets in some loop. This took about minute, so I will try to create java thread dump ... crazy, created cuple of threads and started creating sockets in some loop. This took about minute ... the heap dumps: idle2_4_min - Server was started for 4 minutes and idle. I saw 40 instances
12

java.sql.Date equals comparison not working with CriteriaAPI

.DATE, 11);         cal.set(Calendar.HOUR_OF_DAY, 0);         cal.set(Calendar.MINUTE, 0 ... .MINUTE, 0);         cal.set(Calendar.SECOND, 0);         cal.set(Calendar.MILLISECOND, 0); support Support
12

Modifying something with Explorer -> app JPQL with Enum doesn't work anymore

number is printed. There is a 1 minute delay set. The same as 1, but keep ObjectDB's connection open ... is printed. There is a 1 minute delay set. The same as 1, but keep ObjectDB's connection open. In
3

each 1-2 days objects on some objectdb level lock/block each other

about the number and types of transactions per minute when the system is on load? support Support The 80 ... does take minutes hgzwicker Hans-Georg Zwicker The first 5 thread dumps have been taken at 7:03 ... type per minute, new objects and updates by type per minute), etc. a link for downloading
3

Best practise loading big data

the tool needs less than 2 minutes to read a million values - now as before with different cache settings and enhanced classes it takes more than 8 minutes. This I would have not expected - normally ... the tool needs less than 2 minutes to read a million values - now as before with different cache
3

stress test -> com.objectdb.o.InternalException: null

, but they are relatively light, and the db has just a few MB at the moment. After a few minutes I got this exception ... . If the load is relatively low, the errors start to appear after some minutes or half an hour, or even an hour ... of 100 MB, Tomee runs out of memory in ~20 minutes. With a heap of 512 MB, in around 240 min (4
2

combined index not used

for this process to complete (about 20-30 minutes on your sample database). It may be effective to run ... )) version 2.8.3 query plan (query takes minutes): Query plan 1/16 description

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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