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Monitoring of PostgreSQL cluster, nodes, and databases for 1C

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In managed PostgreSQL databases for 1C, you can monitor the cluster status.

To evaluate the overall cluster status, check its status.

For more detailed analysis, some metrics can be viewed as charts in the control panel:

A full set of available metrics can be exported in Prometheus format.

When analyzing graphs, keep in mind that the time in the Control Panel corresponds to the time on your device and does not depend on the region where the cluster is located.

note

For example, you created a cluster in Tashkent, in the uz-1 pool. The device you used to log into the control panel is set to the Moscow time zone. The time on the metrics charts will be displayed in the Moscow time zone.

View cluster status

  1. In the control panel, on the top menu, click Products and select Managed Databases.
  2. Open the Active tab.
  3. Check the cluster status in the cluster row.
ACTIVECluster is active
CREATINGCluster is being created
UPDATINGCluster is updating
RESIZINGCluster is scaling
ERRORAn error occurred, create a ticket
DISK FULL

The disk is full; the cluster is in read-only mode. To allow read and write operations, clean up the disk or scale the cluster and choose a configuration with a larger disk size

DEGRADEDSome cluster nodes are unavailable
DELETINGCluster is being deleted

View cluster node status

  1. In the control panel, on the top menu, click Products and select Managed Databases.
  2. Open the Active tab.
  3. Open the cluster page → Monitoring tab.
  4. In the Cluster monitoring block, click Cluster nodes.
  5. Select the nodes for which you want to view metrics.
  6. View available cluster node metrics.

Cluster node metrics in the control panel

MemoryOccupied memory excluding operating system cache and buffers, in percent or gigabytes
vCPUPercentage of cluster node cores load
CPU iowaitPercentage of time the processor spent waiting for input/output
Volume

Occupied disk space in percent or gigabytes. It accounts for the part of disk space reserved for service requirements that is unavailable for database storage. For more information on reserving disk space, see the guide Using disk space in a PostgreSQL cluster for 1C

Load Average

The average system load over a period of time. It shows how many processes are being handled by the cluster cores. The indicator is presented as three values—for one minute, five minutes, and 15 minutes. These values should not exceed the number of cores on the node

OOM

Number of processes that ended with an Out of Memory error due to RAM shortage

Disk load

Read and write data speed in KB/s or number of read and write operations per second

Network loadNumber of bits or packets sent and received via the network interface

View database status

  1. In the control panel, on the top menu, click Products and select Managed Databases.
  2. Open the Active tab.
  3. Open the cluster page → Monitoring tab.
  4. In the Cluster monitoring block, click Databases.
  5. Select the nodes for which you want to view metrics.
  6. View available database metrics.

Database metrics in the control panel

Statistics file sizeTotal size of the statistics file in kilobytes
Cache hitPercentage of data in the request read from the cache — the ratio of blks_hit to the sum of blks_hit and blks_read
Row operations

Number of rows affected by operations in the selected database per second:

  • tup_deleted — number of rows deleted by operations per second; ;
  • tup_fetched — number of rows retrieved by operations per second; ;
  • tup_inserted — number of rows inserted by operations per second; ;
  • tup_returned — number of rows returned by operations per second; ;
  • tup_updated — number of rows updated by operations per second
LocksNumber of locks in each cluster database
DeadlocksNumber of deadlocks in each database
TransactionsNumber of transactions per second in each cluster database
ConnectionsNumber of connections to each cluster database and total number of connections to all databases
Temporary file sizeTotal size of temporary files in kilobytes
WAL file sizeTotal size of WAL files in megabytes
Duration of the longest requestDuration of the longest request in each cluster database for a time period
Database sizeTotal size of the selected database in megabytes

View connection pooler status

  1. In the control panel, on the top menu, click Products and select Managed Databases.
  2. Open the Active tab.
  3. Open the cluster page → Monitoring tab.
  4. In the Cluster monitoring block, click Connection pooler.
  5. Select the nodes for which you want to view metrics.
  6. View available connection pooler metrics.

Connection pooler metrics in the control panel

Maximum client wait time in queueMaximum client wait time in queue in the selected database in seconds
Response wait time from serverWait time for a response from the node in the selected database in seconds
Active connections to the serverNumber of server connections associated with clients, in the selected database
Client connections to the pool

Number of client connections to the pool in the selected database:

  • pools_client_active_connections — number of client connections associated with server connections or idle without requests; ;
  • pools_client_waiting_connections — number of client connections where the request has been sent, but there is no connection to the node yet

Export metrics in Prometheus format

Historical information is not available for clusters; metrics are requested only in real time. A list of all metrics supported in managed databases and their descriptions can be viewed in the Metrics in Prometheus format table.

  1. Get a token.
  2. Get metrics in Prometheus format.

1. Get a token

The token provides access to metrics for all project clusters in one pool.

  1. In the control panel, on the top menu, click Products and select Managed Databases.

  2. Open the Active tab.

  3. Open the cluster page → Monitoring tab.

  4. In the Prometheus tokens block, click Create token. The token will be generated automatically.

  5. Copy the token. To do this, click in the token line.

2. Get metrics in Prometheus format

  1. Add to the Prometheus configuration file:

    scrape_configs:
    - job_name: get-metrics-from-dbaas
    scrape_interval: 1m
    static_configs:
    - targets:
    - '<domain>'
    scheme: https
    authorization:
    type: Bearer
    credentials: <token>

    Specify:

    • <domain> is the Managed Databases API domain. It is part of the URL used to access the API without https:// and /v1, for example, ru-3.dbaas.selcloud.ru. The URL depends on the region and pool and can be found in the list of URLs;
    • <token> — the token you copied when getting the token in step 5.
  2. Open the page in your browser where metrics in Prometheus format will be available:

    http://<ip_address>:9090/targets

    Specify <ip_address> — the IP address where Prometheus is installed.

  3. Set up monitoring and alerts for database clusters yourself.

Metrics in Prometheus format

Metrics in Prometheus format are provided for all clusters. A specific cluster can be found by its database cluster ID in the ds_id label.

dbaas_memory_percentOccupied memory excluding operating system cache and buffers (RAM) in percent
dbaas_memory_bytesOccupied memory excluding operating system cache and buffers (RAM) in bytes
dbaas_oom_countNumber of processes that ended with an Out of Memory error due to RAM shortage
dbaas_cpuvCPU usage on database cluster nodes in percent
dbaas_cpu_iowaitInput/output wait time in percent
dbaas_disk_percent

Occupied disk space in percent. It accounts for the part of disk space reserved for service requirements that is unavailable for database storage. For more information on reserving disk space, see the guide Using disk space in a PostgreSQL cluster for 1C

dbaas_disk_bytes

Occupied disk space in bytes. It accounts for the part of disk space reserved for service requirements that is unavailable for database storage. For more information on reserving disk space, see the guide Using disk space in a PostgreSQL cluster for 1C

dbaas_disk_read_iopsNumber of read operations per second
dbaas_disk_write_iopsNumber of write operations per second
dbaas_disk_read_bytesDisk read speed in bytes per second
dbaas_disk_write_bytesDisk write speed in bytes per second
dbaas_node_load1Average system load over one minute. Shows how many processes are being handled by cluster cores
dbaas_node_load5Average system load over five minutes. Shows how many processes are being handled by cluster cores
dbaas_node_load15Average system load over 15 minutes. Shows how many processes are being handled by cluster cores
dbaas_network_receive_bytesNumber of bytes received via the network interface
dbaas_network_transmit_bytesNumber of bytes sent via the network interface
dbaas_network_receive_packetsNumber of packets received via the network interface per second
dbaas_network_transmit_packetsNumber of packets sent via the network interface per second
dbaas_role

Node role:

  • 0 — role is unknown; ;
  • 1 — master; ;
  • 2 — replica