[freenet-dev] [freenet-cvs] r15221 - trunk/freenet/src/freenet/node

[Matthew Toseland]

I'm not sure this is helpful. Our database objects are rather small. I presume 
that BDB's internal btree nodes are 2k?

On Friday 21 September 2007 02:40, you wrote:
> Author: juiceman
> Date: 2007-09-21 01:40:05 +0000 (Fri, 21 Sep 2007)
> New Revision: 15221
> 
> Modified:
>    trunk/freenet/src/freenet/node/Node.java
> Log:
> Increase JE DB read buffer block size from 2K to 6K to virtually eliminate 
nRepeatFaultReads see
> http://www.oracle.com/technology/products/berkeley-db/faq/je_faq.html#39
> and
> 
http://www.oracle.com/technology/documentation/berkeley-db/je/java/com/sleepycat/je/EnvironmentStats.html#getNRepeatFaultReads()
> 
> Shouldn't materially affect total memory usage but may give a slight read 
performance increase.
> 
> 
> Modified: trunk/freenet/src/freenet/node/Node.java
> ===================================================================
> --- trunk/freenet/src/freenet/node/Node.java	2007-09-21 00:18:40 UTC (rev 
15220)
> +++ trunk/freenet/src/freenet/node/Node.java	2007-09-21 01:40:05 UTC (rev 
15221)
> @@ -948,6 +948,7 @@
>  		envConfig.setTxnWriteNoSync(true);
>  		envConfig.setLockTimeout(600*1000*1000); // should be long enough even 
for severely overloaded nodes!
>  		// Note that the above is in *MICRO*seconds.
> +		envConfig.setConfigParam("je.log.faultReadSize", "6144");
>  		
>  		File dbDir = new File(storeDir, "database-"+getDarknetPortNumber());
>  		dbDir.mkdirs();
> 
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> 
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