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[GLASSFISH-20340] [regression] Make HK2 cache io buffer size is not configurable Created: 17/Apr/13 Updated: 18/Apr/13 Resolved: 18/Apr/13
|Remaining Estimate:||Not Specified|
|Time Spent:||Not Specified|
|Original Estimate:||Not Specified|
|Participants:||mtaube, Sanjeeb Sahoo and Tom Mueller|
It used to be configurable earlier, but during hk2 2.x, it has been changed to become a fixed value. Fix it so that perf team can use it to tune the system.
|Comment by mtaube [ 18/Apr/13 12:49 PM ]|
What is the impact on the customer of the bug?
They will see a performance improvement during startup when io buffer size is optimized for the machine running glassfish
What is the cost/risk of fixing the bug?
This particular change is not risky, will only take effect if a property is specified in osgi.properties
Is there an impact on documentation or message strings?
Which tests should QA (re)run to verify the fix did not destabilize GlassFish?
Which is the targeted build of 4.0 for this fix?
If this an integration of a new version of a component from another project,
|Comment by Tom Mueller [ 18/Apr/13 01:27 PM ]|
I hesitate in approving this in that I don't completely agree that this should even be tunable (or should have ever been tunable). More knobs are not necessarily better, and there isn't any proof that different values are needed for different systems. And even if different values were beneficial, is there actually going to be documentation on how users could actually tune this value or is there a performance tuner that sets the value. IMHO, it would be better to just determine a single value that is reasonable for the systems that we target and put that value in the code.
Approved for 4.0.