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Log slow reads in BOBS.

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This commit is contained in:
Mike Hearn 2012-02-24 15:25:06 +01:00
parent 168a5a40e1
commit c8e76a8f9b
1 changed files with 13 additions and 0 deletions
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13
src/com/google/bitcoin/store/BoundedOverheadBlockStore.java
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@ -27,6 +27,7 @@ import java.io.RandomAccessFile;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;
@ -263,12 +264,18 @@ public class BoundedOverheadBlockStore implements BlockStore {
// Use our own file pointer within the tight loop as updating channel positions is really expensive.
long pos = startPos;
Record record = new Record();
int numMoves = 0;
long startTime = new Date().getTime();
do {
if (!record.read(channel, pos, buf))
throw new IOException("Failed to read buffer");
if (record.getHeader(params).getHash().equals(hash)) {
// Found it. Update file position for next time.
channel.position(pos);
long endTime = new Date().getTime();
if (endTime - startTime > 100) {
log.info("Spent {} seconds doing {} backwards seeks", (endTime - startTime) / 1000.0, numMoves);
}
return record;
}
// Did not find it.
@ -280,13 +287,19 @@ public class BoundedOverheadBlockStore implements BlockStore {
pos = pos - Record.SIZE;
assert pos >= 1 + 32 : pos;
}
numMoves++;
} while (pos != startPos);
// Was never stored.
channel.position(pos);
long endTime = new Date().getTime();
if (endTime - startTime > 1000) {
log.info("Spent {} seconds doing {} backwards seeks", (endTime - startTime) / 1000.0, numMoves);
}
return null;
}
public synchronized StoredBlock getChainHead() throws BlockStoreException {
// This will hit the cache
StoredBlock head = get(chainHead);
if (head == null)
throw new BlockStoreException("Corrupted block store: chain head not found");