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* Scale prng.buffers based on max memory, reduce default from 16 to 9

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zzz
2010-06-29 02:30:40 +00:00
parent 22ea79a4ff
commit df7b3dd861
1 changed files with 10 additions and 2 deletions
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12
router/java/src/net/i2p/router/RouterContext.java
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@ -92,8 +92,16 @@ public class RouterContext extends I2PAppContext {
envProps = new Properties();
if (envProps.getProperty("time.disabled") == null)
envProps.setProperty("time.disabled", "false");
if (envProps.getProperty("prng.buffers") == null)
envProps.setProperty("prng.buffers", "16");
if (envProps.getProperty("prng.buffers") == null) {
// How many of these 256 KB buffers do we need?
// One clue: prng.bufferFillTime is ~10ms on my system,
// and prng.bufferFillTime event count is ~30 per minute,
// or about 2 seconds per buffer - so about 200x faster
// to fill than to drain - so we don't need too many
long maxMemory = Runtime.getRuntime().maxMemory();
long buffs = Math.min(16, Math.max(2, maxMemory / (14 * 1024 * 1024)));
envProps.setProperty("prng.buffers", "" + buffs);
}
return envProps;
}