Java CMS remark collection "weak refs processing" phase takes a long time

Solution Verified - Updated -

Issue

  • The "weak refs processing" phase of a CMS remark collection takes a long time. For example:
    26547.786: [GC[YG occupancy: 265341 K (513856 K)]26547.786: [Rescan (parallel) , 0.4281218 secs]26548.215: [weak refs processing, 6.3098393 secs] [1 CMS-remark: 4702208K(7193568K)] 4967549K(7707424K), 6.7428950 secs] [Times: user=7.35 sys=0.65, real=6.74 secs]
    

Environment

  • Oracle JDK
  • OpenJDK

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