Neo4j, one of the most popular databases, is a graph database management system which is ACID-compliant. As with any database, Neo4j is also a core component in any system and requires constant monitoring. Tracking memory management, garbage collection, and also aspects of Neo4j such as growth of your store, active transactions, and many other operational facets is important to understand the relationship between Neo4j and other elements in your IT environment. Applications Manager's Neo4j monitoring tool provides valuable insights into key Neo4j metrics, and notifies of areas that need attention, enabling you to optimize performance of Neo4j servers.
Supported Versions: Neo4j v3.5, 4.4, 5.0 and above
Prerequisites for monitoring Neo4j metrics: Click here
Follow the steps given below to create a new Neo4j monitor:
Go to the Monitors Category View by clicking the Monitors tab. Click on Neo4j under the Database Servers table. Displayed is the Neo4j bulk configuration view distributed into three tabs:
On clicking a monitor from the list, you'll be taken to the Neo4j monitor dashboard. It has 9 tabs-
| Parameter | Description |
|---|---|
| PHYSICAL AND VIRTUAL MEMORY | |
| Total Physical | Size of the total physical memory of the machine in GB. |
| Used Physical | Size of the total physical memory used in GB. |
| Free Physical | Size of the total physical memory free in GB. |
| Committed Virtual | Size of the total virtual memory committed. |
| SWAP MEMORY | |
| Total Swap Space | Size of the total swap space of the machine in GB. |
| Free Swap Space | Size of the total swap space free in GB. |
| Used Swap Space | Size of the total swap space used in GB. |
| SERVER DETAILS | |
| Running connections | The total number of Bolt connections that are currently executing Cypher and returning results. |
| GC young generation | Garbage collection time in millisecondsby GC young generation. |
| GC old generation | Garbage collection time in milliseconds by GC old generation. |
| MEMORY UTILIZATION | |
| Physical Memory Utilization | Total physical memory usage calculated and represented in %. |
| Swap Space Utilization | Total swap space usage calculated and represented in %. |
| Parameter | Description |
|---|---|
| THREAD DETAILS | |
| Daemon | Number of Daemon Threads. |
| Peak | Number of Peak Threads. |
| Live | Number of Live Threads. |
| Total Started | Number of total threads started. |
| Parameter | Description |
|---|---|
| HEAP MEMORY DETAIL | |
| Committed Heap | Size of Heap memory committed in GB. |
| Initial Heap | Size of initial Heap memory in GB. |
| Maximum Heap | Size of maximum Heap memory in GB. |
| Used Heap | Size of Heap memory used in GB. |
| NON HEAP MEMORY DETAIL | |
| Committed Non Heap | Size of Non Heap memory committed in GB. |
| Initial Non Heap | Size of initial Non Heap memory in GB. |
| Maximum Non Heap | Size of maximum Non Heap memory in GB. |
| Used Non Heap | Size of Non Heap memory used in GB. |
| Parameter | Description |
|---|---|
| PAGE CACHE COUNT DETAILS | |
| Hit Ratio | Ratio of hits to the total number of lookups in the page cache |
| Hits | Number of page hits. How often requested data was found in memory. |
| Exception while Page Eviction | Number of exceptions caught during page eviction. |
| Evictions | Number of page evictions. How many pages have been removed from memory to make room for other pages. |
| Faults | Number of page faults. How often requested data was not found in memory and had to be loaded. |
| Flushes | Number of page flushes. How many dirty pages have been written to durable storage. |
| Usage Ratio | The percentage of used pages. |
| PAGE CACHE SIZE DETAILS | |
| Read | Number of bytes read from durable storage. |
| Write | Number of bytes written to durable storage. |
| Files Mapped | Number of files that have been mapped into the page cache. |
| Files UnMapped | Number of files that have been unmapped from the page cache. |
| Pins | Number of page pins. How many pages have been accessed. |
| UnPins | Number of page unpins. How many pages have been accessed and are not accessed anymore. |
| Parameter | Description |
|---|---|
| DATABASES | |
| Database Name | The name of the database being monitored. |
| Role | The cluster role which the server fulfills for this database. |
| Current Status | The state the database is actually in on this server. |
| Access Mode | The database access mode, either read-write or read-only. |
| Checkpoint Duration | The duration, in milliseconds, of the last checkpoint event. |
| Query execution Latency(ms) | Execution time in milliseconds of queries executed successfully. |
| STORE AND ID ALLOCATION | |
| Database Name | The name of the database being monitored. |
| Node Ids | The total number of nodes stored in the database. |
| Property | The total number of different property names used in the database. |
| Relationship | The total number of relationships stored in the database. |
| Relationship type | The total number of different relationship types stored in the database. |
| Total store size(KB) | The total size of the database and transaction logs. |
| Database store size(KB) | The size of the database. |
| Transaction log rotation events | The total number of transaction log rotations executed. |
| Transaction log rotation totaltime(ms) | The total time, in milliseconds, spent in rotating transaction logs. |
| Transaction log rotation duration(ms) | The duration, in milliseconds, of the last log rotation event |
| Transaction log appended bytes | The total number of bytes appended to the transaction log. |
| Transaction log flushes | Rate of transaction log flushes. |
| Transaction log append batch size(bytes) | The size of the last transaction append batch. |
| TRANSACTIONS | |
| Database Name | The name of the database being monitored. |
| Last committed id | The ID of the last committed transaction. |
| Committed | The total number of committed transactions. |
| Started | The total number of started transactions. |
| Active | The number of currently active transactions. |
| Rollbacks | The total number of rolled back transactions. |
| Peak Concurrent | The highest peak of concurrent transactions. |
| Parameter | Description |
|---|---|
| CLUSTERING DETAILS | |
| Database Name | The name of the database being monitored. |
| Raftlog append index | The append index of the Raft log. |
| Raftlog commit index | The commit index of the Raft log. |
| Raftlog applied index | The applied index of the Raft log. |
| DISCOVERY DATABASE | |
| Cluster member size(bytes) | The member size of the Discovery cluster. |
| Cluster unreachable size(bytes) | The unreachable size of the Discovery cluster. |
| Cluster convergence(bytes) | The convergence of the Discovery cluster. |
| Parameter | Description |
|---|---|
| CONFIGURATIONS DETAILS | |
| Mounted Database Name | The name of the mounted database. |
| Start Time | The time from which this Neo4j instance was in operational mode. |
| Version | The version of Neo4j. |
| Store Creation Time | The time when this Neo4j graph store was created. |
| Store Id | An identifier that, together with store creation time, uniquely identifies this Neo4j graph store. |
