Error
Error Code:
1257
MySQL Error 1257: ZLIB memory allocation failure
Description
This error indicates that the ZLIB compression library, used by MySQL for various operations like `COMPRESS()`/`UNCOMPRESS()` functions, `InnoDB` compression, or replication, failed to allocate necessary memory. It typically occurs when the system or MySQL process runs out of available memory during a compression or decompression task.
Error Message
ZLIB: Not enough memory
Known Causes
4 known causesLow System Memory
The server running MySQL has insufficient physical RAM available, or other processes are consuming too much memory, preventing ZLIB from allocating its required memory.
MySQL Memory Configuration Limits
MySQL's internal memory settings (e.g., `tmp_table_size`, `max_heap_table_size`, or other buffer sizes) are too small to handle the memory demands of ZLIB for the current operation.
Large Data Compression/Decompression
Attempting to compress or decompress very large data blobs or complex datasets that exceed the available memory allocated to MySQL or the system itself.
Operating System Memory Restrictions
The operating system might have imposed limits on the memory a single process (like MySQL) can use, or insufficient swap space is configured.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service