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This app includes [built-in monitors](#memcached-alerts). For details on creating custom monitors, refer to the [Create monitors for Memcached app](#create-monitors-for-memcached-app).
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Following are the [Fields](/docs/manage/fields/) which will be created as part of Memcached App install if not already present.
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-**`sumo.datasource`**. Has a fixed value of **memcached**.
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-**`db.system`**. Has a fixed value of **memcached**
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-**`deployment.environment`**. User configured. This is the deployment environment where the Memcache cluster resides. For example: dev, prod or qa.
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-**`db.system`**. Has a fixed value of **memcached**.
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-**`deployment.environment`**. User configured. This is the deployment environment where the Memcache cluster resides. For example: dev, prod, or qa.
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-**`db.cluster.name`**. User configured. Enter a name to identify this Memcached cluster. This cluster name will be shown in the Sumo Logic dashboards.
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-**`db.node.name`**. This has value of the FQDN of the machine where OpenTelemetry collector is collecting logs and metrics from.
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## Prerequisites
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1. Configure logging in Memcached: By default, the installation of Memcached will not write any request logs to disk. To add a log file for Memcached, you can use the following syntax:
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| sum(ERROR) as ERROR by _timeslice
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```
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## Sample metrics queries
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**Total Get**
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```
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```sql title="Total Get"
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sumo.datasource=memcached deployment.environment=* db.cluster.name=* db.node.name=* metric=memcached.commands command=get | sum
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```
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## Viewing Memcached Dashboards
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## Viewing the Memcached dashboards
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### Overview
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### Operations
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The **Memcached - Operations** Dashboard provides detailed analysis on connections, thread requested, network bytes, table size.
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The **Memcached - Operations** Dashboard provides detailed analysis on connections, thread requested, network bytes, andtable size.
| `Memcached - Cache Hit Ratio` | The hit rate is one of the most important indicators of Memcached performance. A high hit rate means faster responses to your users. If the hit rate is falling, you need quick visibility into why. This alert is triggered when low cache hit ratio is less than 50% | Count `<=` 50 | Count `>` 50 |
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| `Memcached - Commands Error` | This alert is triggered when Memcached has error commands. | Count `>` 0 | Count `<=` 0 |
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| `Memcached - Current Connections` | This alert is triggered when current connections to Memcached are zero. | Count `<=` 0 | Count `>` 0 |
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| `Memcached - High Memory Usage` | This alert is triggered when the memcached exceed given threshold memory usage (in GB) | Count `>` 5 | Count `<=` 5 |
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| `Memcached - High Number of Connections` | This alert is triggered when the number of current connection for memcached exceed given threshold. | Count `>=` 1000 | Count `<` 1000 |
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| `Memcached - Cache Hit Ratio` | This alert is triggered when low cache hit ratio is less than 50%. The hit rate is one of the most important indicators of Memcached performance. A high hit rate means faster responses to your users. If the hit rate is falling, you need quick visibility into why. | Count <=50% | Count >50% |
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| `Memcached - Commands Error` | This alert is triggered when Memcached has error commands. | Count >0 | Count <=0 |
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| `Memcached - Current Connections` | This alert is triggered when current connections to Memcached are zero. | Count <=0 | Count >0 |
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| `Memcached - High Memory Usage` | This alert is triggered when the Memcached exceed given threshold memory usage (in GB). | Count >5 | Count <=5 |
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| `Memcached - High Number of Connections` | This alert is triggered when the number of current connection for Memcached exceed given threshold. | Count >=1000 | Count <1000 |
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