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Posted to issues@ignite.apache.org by "Roman Kondakov (JIRA)" <ji...@apache.org> on 2018/09/13 21:10:00 UTC

[jira] [Created] (IGNITE-9591) MVCC: Do small write operations under the read lock.

Roman Kondakov created IGNITE-9591:
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             Summary: MVCC: Do small write operations under the read lock.
                 Key: IGNITE-9591
                 URL: https://issues.apache.org/jira/browse/IGNITE-9591
             Project: Ignite
          Issue Type: Improvement
          Components: mvcc
            Reporter: Roman Kondakov


There are several operations in MVCC flow which can be done under the page read lock instead of write lock. For example, setting xid_max on a datarow. It is safe, because races are possible only between concurrent transactions, which are not visible to each other. 

See {{MvccMarkUpdatedHandler}} and other similar handlers in this class.



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