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Add comment in README.md about using interpolateParams=true #35

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sjmudd merged 1 commit into from
Mar 26, 2026
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Add comment in README.md about using interpolateParams=true #35

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7 changes: 7 additions & 0 deletions README.md
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Expand Up @@ -69,6 +69,13 @@ $ export MYSQL_DSN='user:pass@tcp(host:3306)/performance_schema?tls=skip-verify&
$ ps-top
```

A second use case of the `MYSQL_DSN` setting is to avoid the golang
driver executing some statements using prepare and close statement
steps. This adds a tiny bit of extra latency for queries sent to
the backend database. Adding the additional setting
`interpolateParams=true` to the DSN will avoid these stages thus
reducing the number of round trips made when making queries.

#### MySQL/MariaDB configuration

The `performance_schema` database **MUST** be enabled for `ps-top` to work.
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