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PageCache.java
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PageCache.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.management;
import org.neo4j.jmx.Description;
import org.neo4j.jmx.ManagementInterface;
@ManagementInterface( name = PageCache.NAME )
@Description( "Information about the Neo4j page cache" )
public interface PageCache
{
final String NAME = "Page cache";
@Description( "Number of page faults" )
long getFaults();
@Description( "Number of page evictions" )
long getEvictions();
@Description( "Number of page pins" )
long getPins();
@Description( "Number of page unpins" )
long getUnpins();
@Description( "Number of page flushes" )
long getFlushes();
@Description( "Number of bytes read from durable storage" )
long getBytesRead();
@Description( "Number of bytes written to durable storage" )
long getBytesWritten();
@Description( "Number of files that have been mapped into the page cache" )
long getFileMappings();
@Description( "Number of files that have been unmapped from the page cache" )
long getFileUnmappings();
@Description( "Number of exceptions caught during page eviction" )
public long getEvictionExceptions();
}