For FullGC of Java, FullGC occurs when the Old area or Permanent area of the Java heap is exhausted.
If Java FullGC slows down the operation, the values set for Java memory-related such as the Old area and the Permanent area of the Java heap might not be suitable for the operating environment and operating status, or the operating environment might be excessive settings which do not match.
●The following events can be considered.
・If the set value is small, FullGC frequently occurs and the processing speed generally continues to decrease.
・When the set value is excessively large, it is temporally but FullGC is performed spending a considerable amount of time to perform a large amount of GC, so the processing continuously seems to be temporarily stopped.
・The processing capacity of the operating environment is low, the time required for FullGC is long, and the status continuously seems to be stopped.
In order to solve such status, it is necessary to understand the processing capacity of the operating environment and the status of the operating environment and make an appropriate setting that matches the operating environment.
*You can also use the Resin Admin function of Resin as a means to understand the status of the application side of the operating environment to some extent.
The setting method of Resin Admin is described in the following developer blog.
・Intra-mart Advent Calendar 2013 Day 9: Introduction of Resin Admin
https://dev.intra-mart.jp/intra-mart_advent_calendar_2013_9resin_admin/
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