Ivan Bessonov created IGNITE-27192:
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Summary: Optimize catalog access in CatalogManagerImpl
Key: IGNITE-27192
URL: https://issues.apache.org/jira/browse/IGNITE-27192
Project: Ignite
Issue Type: Improvement
Reporter: Ivan Bessonov
Assignee: Ivan Bessonov
Reading the catalog by its version or timestamp is a hot operation that is
executed very frequently:
{code:java}
org.apache.ignite.internal.catalog.CatalogManagerImpl#catalog
org.apache.ignite.internal.catalog.CatalogManagerImpl#activeCatalog {code}
Current implementation (two mentioned methods) wastes resources on primitive
types boxing, and then on multiple volatile memory accesses. I propose
replacing current structures with COW thread-unsafe maps with primitive key
types, in order to maximize the performance of reading.
Performance of writing shouldn't suffer that much, there are will rarely be
more than a few hundred catalog versions to copy. But if we ever encounter this
problem we will replace
{{Primitive2ObjectSortedMap}} with a more fitting structure that will share all
the same benefits, but allow for a faster updates.
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