MSSQL performance metricset

MSSQL performance metricsetedit

performance Metricset fetches information from what’s commonly known as Performance Counters in MSSQL.

We fetch the following data:

  • page_splits_per_sec: Number of page splits per second that occur as the result of overflowing index pages.
  • lock_waits_per_sec: Number of lock requests per second that required the caller to wait.
  • user_connections: Total number of user connections
  • transactions: Total number of transactions
  • active_temp_tables: Number of temporary tables/table variables in use.
  • connections_reset_per_sec: Total number of logins started from the connection pool.
  • logins_per_sec: Total number of logins started per second. This does not include pooled connections.
  • logouts_per_sec: Total number of logout operations started per second.
  • recompilations_per_sec: Number of statement recompiles per second. Counts the number of times statement recompiles are triggered. Generally, you want the recompiles to be low.
  • compilations_per_sec: Number of SQL compilations per second. Indicates the number of times the compile code path is entered. Includes compiles caused by statement-level recompilations in SQL Server. After SQL Server user activity is stable, this value reaches a steady state.
  • batch_requests_per_sec: Number of Transact-SQL command batches received per second. This statistic is affected by all constraints (such as I/O, number of users, cache size, complexity of requests, and so on). High batch requests mean good throughput.
  • cache_hit.pct: The ratio is the total number of cache hits divided by the total number of cache lookups over the last few thousand page accesses. After a long period of time, the ratio moves very little. Because reading from the cache is much less expensive than reading from disk, you want this ratio to be high
  • page_life_expectancy.sec: Indicates the number of seconds a page will stay in the buffer pool without references (in seconds).
  • buffer.checkpoint_pages_per_sec: Indicates the number of pages flushed to disk per second by a checkpoint or other operation that require all dirty pages to be flushed.
  • buffer.database_pages: Indicates the number of pages in the buffer pool with database content.
  • buffer.target_pages: Ideal number of pages in the buffer pool.

This is a default metricset. If the host module is unconfigured, this metricset is enabled by default.

Fieldsedit

For a description of each field in the metricset, see the exported fields section.

Here is an example document generated by this metricset:

{
    "@timestamp": "2017-10-12T08:05:34.853Z",
    "event": {
        "dataset": "mssql.performance",
        "duration": 115000,
        "module": "mssql"
    },
    "metricset": {
        "name": "performance",
        "period": 10000
    },
    "mssql": {
        "performance": {
            "active_temp_tables": 0,
            "batch_requests_per_sec": 3355,
            "buffer": {
                "cache_hit": {
                    "pct": 0.22
                },
                "checkpoint_pages_per_sec": 295,
                "database_pages": 2152,
                "page_life_expectancy": {
                    "sec": 1400
                },
                "target_pages": 3178496
            },
            "compilations_per_sec": 1151,
            "connections_reset_per_sec": 88,
            "lock_waits_per_sec": 6,
            "logins_per_sec": 1105,
            "logouts_per_sec": 1103,
            "page_splits_per_sec": 14,
            "recompilations_per_sec": 2,
            "transactions": 0,
            "user_connections": 2
        }
    },
    "service": {
        "address": "172.23.0.2:1433",
        "type": "mssql"
    }
}