Ivan Rakov created IGNITE-11156:
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Summary: FreeLists are overflowed with pages with almost no free
space left
Key: IGNITE-11156
URL: https://issues.apache.org/jira/browse/IGNITE-11156
Project: Ignite
Issue Type: Improvement
Reporter: Ivan Rakov
Assignee: Ivan Rakov
Fix For: 2.8
{code:java}
/** */
private static final int MIN_PAGE_FREE_SPACE = 8;
{code}
If data pages has 8 free bytes or more, it will be stored in a free list. As
result, free lists mostly contain "free pages" that are actually useless: pair
of (boolean, boolean) takes approximately 50 bytes. I think, we'll increase
this constant to something like 40, memory will be used more efficiently in
result and WAL usage will decrease.
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