何百万ものノードと関係を含む大きなグラフがあります。フープ数が 5 以下のノードのグループ間で考えられるすべての関係を見つける必要があります。 例: GroupA { Node1, Node2, Node3, .. Node100} 100 ノードのノードのグループ。
今、私はこのすべてのノード間のすべての可能な関係を見つけたいと思っています。
100 個のノードを含む Cypher Query を実行するとすべて問題ありませんが、101 個のノードで実行すると TimeOut が発生します。(すべてのリクエストはRESTです)
{
"query": "start s = node(114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214), d = node(114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214) match p = s -[r?*0..5]-> d return p ",
"params": {}
}
誰かが私に何が起こるか説明できますか? 不適切なクエリ ??
更新: 発見された別の問題: ループで 200 の Cypher クエリを実行すると、サーバーはクエリ番号 100 の後に応答を停止します
Something like that
for (i=0; i<200; i++)
{
query = "start s = node(" + sourceNodeId + "), d = node(" + destinationNodeid + ") match p = s -[r?*0.." + deep + "]-> d return p"
RunCypherQuery(query);
}
この奇妙な動作の原因は何ですか? 10倍
アップデート：
メモリ調整を実行し、JavaMemory Min And Max を 4M と 64M ではなく 4G に増やしました結果は Exception です:
Error 500 GC overhead limit exceeded
HTTP ERROR 500
Problem accessing /db/data/cypher.
Reason:
GC overhead limit exceeded</pre></p><h3>Caused by:</h3><pre>java.lang.OutOfMemoryError: GC overhead limit exceeded
at scala.collection.JavaConversions$.mapAsScalaMap(JavaConversions.scala:488)
at scala.collection.JavaConverters$$anonfun$mapAsScalaMapConverter$1.apply(JavaConverters.scala:441)
at scala.collection.JavaConverters$$anonfun$mapAsScalaMapConverter$1.apply(JavaConverters.scala:441)
at scala.collection.JavaConverters$AsScala.asScala(JavaConverters.scala:80)
at org.neo4j.cypher.internal.pipes.MutableMaps$.create(Pipe.scala:60)
at org.neo4j.cypher.internal.pipes.ExecutionContext.newWith(Pipe.scala:136)
at org.neo4j.cypher.internal.pipes.matching.AddedHistory.toMap(History.scala:75)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.isMatchSoFar(PatternMatcher.scala:166)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.org$neo4j$cypher$internal$pipes$matching$PatternMatcher$$traverseNextNodeFromRelationship(PatternMatcher.scala:98)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher$$anonfun$4.apply(PatternMatcher.scala:150)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher$$anonfun$4.apply(PatternMatcher.scala:150)
at scala.collection.immutable.Stream$$anonfun$map$1.apply(Stream.scala:175)
at scala.collection.immutable.Stream$$anonfun$map$1.apply(Stream.scala:175)
at scala.collection.immutable.Stream$Cons.tail(Stream.scala:634)
at scala.collection.immutable.Stream$Cons.tail(Stream.scala:626)
at scala.collection.immutable.Stream.foldLeft(Stream.scala:302)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseRelationship(PatternMatcher.scala:150)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseNextSpecificNode(PatternMatcher.scala:61)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseNode(PatternMatcher.scala:72)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseNextNodeOrYield(PatternMatcher.scala:177)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseNextSpecificNode(PatternMatcher.scala:60)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseNode(PatternMatcher.scala:72)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.foreach(PatternMatcher.scala:36)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:194)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.map(PatternMatcher.scala:28)
at org.neo4j.cypher.internal.pipes.matching.PatterMatchingBuilder.org$neo4j$cypher$internal$pipes$matching$PatterMatchingBuilder$$createPatternMatcher(PatterMatchingBuilder.scala:90)
at org.neo4j.cypher.internal.pipes.matching.PatterMatchingBuilder$$anonfun$getMatches$1.apply(PatterMatchingBuilder.scala:47)
at org.neo4j.cypher.internal.pipes.matching.PatterMatchingBuilder$$anonfun$getMatches$1.apply(PatterMatchingBuilder.scala:47)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:200)
at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:200)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.yieldThis(PatternMatcher.scala:185)
at org.neo4j.cypher.internal.pipes.matching.PatternMatcher.traverseNextNodeOrYield(PatternMatcher.scala:175)