CachingWrapperFilter.DeletesMode

Class Overview

Expert: Specifies how new deletions against a reopened reader should be handled.

The default is IGNORE, which means the cache entry will be re-used for a given segment, even when that segment has been reopened due to changes in deletions. This is a big performance gain, especially with near-real-timer readers, since you don't hit a cache miss on every reopened reader for prior segments.

However, in some cases this can cause invalid query results, allowing deleted documents to be returned. This only happens if the main query does not rule out deleted documents on its own, such as a toplevel ConstantScoreQuery. To fix this, use RECACHE to re-create the cached filter (at a higher per-reopen cost, but at faster subsequent search performance), or use DYNAMIC to dynamically intersect deleted docs (fast reopen time but some hit to search performance).

Summary

[Expand] Inherited Methods
From class java.lang.Enum final Object clone() int compareTo(Object arg0) final int compareTo(E arg0) final boolean equals(Object arg0) final void finalize() final Class<E> getDeclaringClass() final int hashCode() final String name() final int ordinal() String toString() static <T extends Enum<T>> T valueOf(Class<T> arg0, String arg1)
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait() final void wait(long arg0, int arg1) final void wait(long arg0)
From interface java.lang.Comparable int compareTo(T arg0)

Enum Values

Public Methods