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Occasionally slow requests in load testing

values for recovery => max (try smaller first). Larger processing => cache value. More RAM ... much larger databases, but when the database becomes larger than the available RAM a natural decrease in ... has much more free RAM than database ever uses. The max heap size of the process is set to 8GB

RT Java application recording into 100DB run OOM after a few hours.

it on a VPS with about 4GB of RAM. 1/ I use the default objectDb.conf (i mean i dont use any ... too much? Is there something in object.conf that i should tweak? I think I need to understand how the RAM is managed by ... databases, so it can easily exceeds your VPS RAM. If you must keep 100 databases open concurrently then you will have to reduce cache sizes, etc. support Support

Cache usage

after a runtime of several weeks we are now analyzing the usage of the cache and so on. Looking at the heap dump we suspect that the cache is really used (see heap dump attached), the RAM allocated ... all the free RAM for database file pages, so if you have sufficient free RAM it is expected to be used

ObjectDB shuts down

to keep the necessary amount of RAM available for itself. I experienced something similar when my app server (Tomcat ... Mircea Chirac We monitored the DB server RAM usage and it is max 2%, server has 16GB RAM altough

Server closes if large query runs out of memory

allocation (and uses temporary files instead of RAM) when memory usage is high, but it is far from perfect ... setting. If you reduce the threshold then ObjectDB will use temporary files instead of RAM

-XMX settings recommendation

is better, as long as you have sufficient RAM. You can track the actual heap size in production and see if it is sufficient. If you have RAM constraints and the heap size is tight, you may have to reduce

large numbers of records

, since I/O operations are slower than RAM access. See this page for information about ObjectDB limits ... with persistent RAM so there is no problem of data loss. peric.emil Emil Perić ObjectDB supports pure memory

doctor error message after database getting page errors

system with around 40 GByte free RAM (database is around 37 GByte) ends up with a heap exception see attachment ... seems to run fine with the default JVM heap size on a PC with 16GB RAM. Did a server restart solve

Which storage fits best to ObjectDB?

read/write the DB files by large chunks and then it parses it within the RAM (so it would mean ... are loaded from disk to RAM (when needed). Therefore, unless the database file is small and cached

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

, RAM to 96 GByte. the behaviour still the same we are really with our back at the wall, the customer ... increase RAM and cores hgzwicker Hans-Georg Zwicker Did the issue start at 7:03? The first thread dump ... 03 seems to have a memory leak, we had to shut down now the complete system on 60 GByte RAM used

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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