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Critical severityresource

Power BI Refresh Error:
1114

What does this error mean?

The table cannot accept more data — disk space is exhausted, or the table has hit a storage engine size limit.

Common causes

  • 1Disk or tablespace is full — InnoDB cannot extend the .ibd file
  • 2MyISAM table has reached the max_rows or AVG_ROW_LENGTH limit defined at creation
  • 3MEMORY (HEAP) table has exceeded the max_heap_table_size limit
  • 4InnoDB is configured with a fixed-size system tablespace that is full

How to fix it

  1. 1Step 1: Check disk usage: `df -h` on the MySQL data directory (typically /var/lib/mysql).
  2. 2Step 2: For MEMORY tables, increase the limit: `SET GLOBAL max_heap_table_size=1073741824;` or convert to InnoDB.
  3. 3Step 3: For MyISAM tables, alter to increase the row limit: `ALTER TABLE your_table MAX_ROWS=1000000000 AVG_ROW_LENGTH=200;`
  4. 4Step 4: For InnoDB, free disk space, add a new data file to the tablespace, or move the data directory to a larger volume.

Frequently asked questions

How do I check which MySQL tables are using the most disk space?

Run `SELECT table_schema, table_name, ROUND((data_length + index_length)/1024/1024, 2) AS size_mb FROM information_schema.tables ORDER BY size_mb DESC LIMIT 20;`

Why does the MySQL MEMORY engine have a size limit?

MEMORY tables are stored in RAM, not on disk. The max_heap_table_size variable limits how much RAM a single MEMORY table can use to prevent a runaway table from consuming all server memory.

Can MetricSign alert me when this error occurs in a pipeline?

Yes — MetricSign captures ADF pipeline failures and surfaces the MySQL error code immediately, so you can investigate disk or memory exhaustion before it impacts more pipelines.

Official documentation: https://dev.mysql.com/doc/mysql-errors/8.0/en/server-error-reference.html

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