在neo4j管理导入后创建唯一约束时遇到无休止的重新启动

我正在设置一个新的Neo4jv3.5.4社区实例。安装后，考虑到我的机器包含32G RAM，我将neo4j的初始和最大堆大小设置为16G，页面缓存设置为40G。然后我做了以下步骤：

使用neo4j管理工具将我的数据导入数据库，其中包含

启动neo4j

我的一个节点标签叫做“Contact”，它包含一个“tel”属性。由于每个联系人的tel都是唯一的，因此我希望创建唯一约束，如下所示：

然后我遇到了无尽的重新开始。。。如下面的日志所示，neo4j开始填充索引，几分钟后，graph.db变得不可用，然后重新启动。重新启动后，它会尝试填充索引，几分钟后，它会无休止地重新启动。日志中没有异常或错误

2019-04-25 06:08:57.100+0000 INFO [o.n.k.i.a.i.IndexPopulationJob] Index population started: [:Contact(tel) [provider: {key=native-btree, version=1.0}]]
2019-04-25 06:14:03.535+0000 INFO [o.n.g.f.m.e.CommunityEditionModule] No locking implementation specified, defaulting to 'community'
2019-04-25 06:14:03.718+0000 INFO [o.n.g.f.GraphDatabaseFacadeFactory] Creating 'graph.db' database.
2019-04-25 06:14:03.795+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Requirement `Database available` makes database graph.db unavailable.
2019-04-25 06:14:03.798+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Database graph.db is unavailable.
2019-04-25 06:14:03.853+0000 INFO [o.n.i.d.DiagnosticsManager] --- INITIALIZED diagnostics START ---
...
.....
.........
2019-04-25 06:14:06.222+0000 INFO [o.n.k.i.a.i.IndexPopulationJob] Index population started: [:Contact(tel) [provider: {key=native-btree, version=1.0}]]
2019-04-25 06:19:11.935+0000 INFO [o.n.g.f.m.e.CommunityEditionModule] No locking implementation specified, defaulting to 'community'
2019-04-25 06:19:12.106+0000 INFO [o.n.g.f.GraphDatabaseFacadeFactory] Creating 'graph.db' database.
2019-04-25 06:19:12.186+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Requirement `Database available` makes database graph.db unavailable.
2019-04-25 06:19:12.188+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Database graph.db is unavailable.

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我不知道为什么会这样。任何建议都将不胜感激

当您只有32g的RAM时，为什么要将40g分配给pagecache？使用

neo4j admin memrec

获取有关如何配置堆和页面缓存的建议，不过为了完成此操作，您可能暂时需要更多堆空间。谢谢！我通过减小页面缓存大小解决了这个问题。堆空间正常。

  CREATE CONSTRAINT ON (c:Contact) ASSERT c.tel IS UNIQUE

2019-04-25 06:08:57.100+0000 INFO [o.n.k.i.a.i.IndexPopulationJob] Index population started: [:Contact(tel) [provider: {key=native-btree, version=1.0}]]
2019-04-25 06:14:03.535+0000 INFO [o.n.g.f.m.e.CommunityEditionModule] No locking implementation specified, defaulting to 'community'
2019-04-25 06:14:03.718+0000 INFO [o.n.g.f.GraphDatabaseFacadeFactory] Creating 'graph.db' database.
2019-04-25 06:14:03.795+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Requirement `Database available` makes database graph.db unavailable.
2019-04-25 06:14:03.798+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Database graph.db is unavailable.
2019-04-25 06:14:03.853+0000 INFO [o.n.i.d.DiagnosticsManager] --- INITIALIZED diagnostics START ---
...
.....
.........
2019-04-25 06:14:06.222+0000 INFO [o.n.k.i.a.i.IndexPopulationJob] Index population started: [:Contact(tel) [provider: {key=native-btree, version=1.0}]]
2019-04-25 06:19:11.935+0000 INFO [o.n.g.f.m.e.CommunityEditionModule] No locking implementation specified, defaulting to 'community'
2019-04-25 06:19:12.106+0000 INFO [o.n.g.f.GraphDatabaseFacadeFactory] Creating 'graph.db' database.
2019-04-25 06:19:12.186+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Requirement `Database available` makes database graph.db unavailable.
2019-04-25 06:19:12.188+0000 INFO [o.n.k.a.DatabaseAvailabilityGuard] Database graph.db is unavailable.