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Quick Lists
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Bug ID:
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6459113
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Votes
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0
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Synopsis
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CMS+ParNew: wildly different ParNew pause times depending on heap shape caused by allocation spread
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Category
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hotspot:garbage_collector
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Reported Against
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b03
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Release Fixed
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hs10(b03),
5.0u10(b02) (Bug ID:2141972)
, 6u1(b01) (Bug ID:2141973)
, 1.4.2_14(b01) (Bug ID:2141974)
, 7(b03) (Bug ID:2176745)
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State
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10-Fix Delivered,
bug
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Priority:
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3-Medium
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Related Bugs
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6433335
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6446077
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Submit Date
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10-AUG-2006
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Description
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See comments section for email thread.
Posted Date : 2006-08-10 19:36:07.0
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Work Around
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-XX:-UseParNewGC reduces the slow down substantially (same as 6433335);
alternatively, set -Xmx and -Xms the same to avoid the "allocation
spread" that tickles this behaviour (at least with this program).
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Evaluation
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See suggested fix, comments and workaround. We should fix this in 6u1
and backport as appropriate since it can cause performance surprises.
Posted Date : 2006-08-15 19:14:14.0
This bug fix should be backported along with that for 6433335.
Posted Date : 2006-09-13 00:13:35.0
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Comments
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PLEASE NOTE: JDK6 is formerly known as Project Mustang
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