Hi,
I had a closer look at the performance of the myDelete() method.
Time being spent as percentage of total time in MyDelete():
% of total time in flush()
1 min 20%
10 min 45%
After 1 minute the hotspots look like this for flush() (self time = total
time - time being spent in other methods)
method
self time (%) invocations
------------------------------------------------------------------------------------------------------------------------------
java.io.DataInputStream.readFully(byte[], int, int)
913 ms (23%) 1224
java.util.HashMap.getEntry(Object)
74.1 ms (1,9%) 48831
java.io.DataOutputStream.write(byte[], int, int)
50.2 ms (1,3%) 610
java.util.BitSet.get(int)
31.5 ms (0,8%) 107295
org.apache.openjpa.lib.util.concurrent.ReentrantLock.unlock()
26.5 ms (0,7%) 92485
......
java.io.DataOutputStream.flush()
1.7 ms (0%) 4178
after 10 mintes:
method
self time (%) invocations
---------------------------------------------------------------------------------------------------------------------------
java.io.DataInputStream.readFully(byte[], int, int)
7435 ms (5,4%) 21732
java.util.BitSet.get(int)
2920 ms (2,1%) 9607796
org.apache.openjpa.kernel.StateManagerImpl.proxyFields(boolean, boolean)
2459 ms (1,8%) 726936
org.apache.openjpa.kernel.SingleFieldManager.proxy(boolean, boolean)
1671 ms (1,2%) 4114255
org.apache.openjpa.meta.ClassMetaData.getField(int)
1128 ms (0,8%) 4784295
org.apache.commons.collections.map.AbstractReferenceMap$ReferenceEntrySetIterator.hasNext()
1083 ms (0,8%) 1449895
org.apache.openjpa.kernel.StateManagerImpl.provideField(PersistenceCapable,
FieldManager, int) 978 ms (0,7%) 4128617
......
java.io.DataOutputStream.write(byte[], int, int)
836 ms (0,6%) 10864
......
java.io.DataOutputStream.flush()
2.92 ms (0%) 10864
btw, BitSet.get() is being called in StateManagerImpl.preFlush()
So over time there is a significant increase in the time being spent in
openjpa methods.
kind regards,
Christiaan
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