Hi Peter,
It is really hard to tell exactly what the problem with your code is,
because it is not a complete one, but in case of OOM some "irrelevant"
details may be a culprit.
Nevertheless, it looks like "data" is some sort of a queue, continuously
populated by another thread, or just a big chunk of preropulated data?
In both cases your condition for batch commit (data.size() % 100000 == 0 ||
data.size() < 100000) looks suspicious. Let's assume prepopulated data of
size
100000 * 12345 +1
You may end up committing batch of size 1.2 billion+, wchich would totally
explain OOM..
On Tuesday, November 21, 2023 at 5:41:30 AM UTC-5 mche...@gmail.com wrote:
> Dear All
> I keep clicking the data to h2 by stmt.addBatch(), after i called
> executeBatch, memory is not free, so finally out of memory, may i know why
> please?
>
>
> @Override
> public void run() {
> while (!stopped) {
> synchronized (sharedLock) {
> try {
> // System.out.println("data.size() =" + data.size());
> for (int z = 0; z < data.size() && z < 100000; z++) {
> Object[] temp;
> synchronized (data) {
> temp = data.pollLast();
> }
> int x = 1;
> stmt.setLong(x++, (Long) temp[0]);
> stmt.setString(x++, (String) temp[1]);
> stmt.setString(x++, (String) temp[2]);
> stmt.setString(x++, (String) temp[3]);
> stmt.setInt(x++, (int) temp[4]);
> for (int tempX = 0; tempX < registers.size(); tempX++) {
> stmt.setLong(x, ((BigInteger) temp[x - 1]).longValue());
> x++;
> }
> stmt.addBatch();
> }
> if (data.size() % 100000 == 0 || data.size() < 100000) {
> stmt.executeBatch();
> conn.commit();
> }
> } catch (SQLException ex) {
> Logger.getLogger(H2Thread.class.getName()).log(Level.SEVERE, null, ex);
> }
> }
> try {
> Thread.sleep(500);
> } catch (InterruptedException ex) {
> Logger.getLogger(H2Thread.class.getName()).log(Level.SEVERE, null, ex);
> }
> }
> }
>
> thanks
> Peter (mche...@hotmail.com)
>
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