<p>MySQL returns error 1375 when PURGE BINARY LOGS is blocked by server settings that forbid manual binlog deletion.</p>
<p>MySQL Error 1375: ER_BINLOG_PURGE_PROHIBITED appears when the server is configured to block manual PURGE BINARY LOGS. Adjust binlog_expire_logs_seconds or related replication settings, then rerun the purge.</p>
Server configuration does not permit binlog purge
Error 1375 fires when you issue PURGE BINARY LOGS and the server responds with Server configuration does not permit binlog purge. MySQL blocks the request to avoid breaking replication or retention policies.
The error safeguards data integrity. If a replica still needs a binary log, purging it could halt replication or break point-in-time recovery. Fixing the configuration lets you manage logs safely.
The message appears on standalone servers with zero or negative binlog_expire_logs_seconds, on replication primaries running read-only or super_read_only, and on Group Replication members that handle log cleanup automatically.
It also surfaces when binlog retention is enforced by gtid_purged limits or by variables such as binlog_always_validate_checksum that expect full log chains.
Leaving logs to accumulate consumes disk space and slows backup jobs. Fixing the configuration restores your ability to rotate logs, frees storage, and keeps replication healthy.
For regulated workloads, retention settings may be part of compliance, so you must balance purge permissions with audit requirements.
The primary cause is a server setting that marks binlog deletion as prohibited. MySQL returns HY000 to indicate a generic runtime refusal, not a syntax fault.
Variables that trigger the block include binlog_expire_logs_seconds set to 0, read_only or super_read_only set to ON, gtid_mode = ON with enforcements, and group_replication_consistency demanding full logs.
First confirm the current settings: SHOW VARIABLES LIKE 'binlog%'; and SELECT @@global.read_only; . If auto-expire is disabled or the server is read-only, adjust them.
Increase binlog_expire_logs_seconds to a positive value, disable read-only, or temporarily remove the server from Group Replication before purging. Then issue PURGE BINARY LOGS again.
On a standalone production primary, set binlog_expire_logs_seconds to 604800 (7 days) and rely on auto purge. For replicas, keep read_only but run PURGE BINARY LOGS on the primary only.
In Group Replication, avoid manual purges; instead tune binlog_expire_logs_seconds and gtid_purged. If manual cleanup is required, remove the node from the group, purge, then rejoin.
Enable automatic cleanup with binlog_expire_logs_seconds or binlog_expire_logs_days. Monitor disk usage with performance_schema and set alerts well below capacity.
Automate log verification using mysqlbinlog and GTID checks before purging. Use Galaxy collections to version your maintenance scripts and share endorsed procedures across the team.
ER_BINLOG_PURGE_FATAL_ERR (1378) means the purge started but failed; recheck file permissions and restart. ER_BINLOG_PURGE_EMFILE (1373) signals too many open files; raise open_files_limit or purge fewer logs per call.
Replication stops with ER_MASTER_FATAL_ERROR_READING_BINLOG; ensure the upstream did not delete required logs before replicas applied them.
A zero value disables automatic purge and blocks manual PURGE BINARY LOGS.
Read-only mode protects data by forbidding destructive statements, including log deletion.
Group members coordinate log retention; MySQL stops manual purges to avoid breaking consensus.
GTID mode may block purges until all transactions are safely processed by every replica.
Purge started but failed due to I/O or permission issues.
Too many open files when purging; increase open_files_limit.
Replica lost required log; resync or restore missing files.
Group Replication waits for full log apply, delaying purges.
No. Ignoring it leads to unchecked binary log growth and potential disk exhaustion.
No. You can SET GLOBAL at runtime and add it to my.cnf for persistence.
Keep logs long enough for point-in-time recovery and replica lag. Seven to fourteen days suits most SaaS workloads.
Galaxy lets you store and version maintenance scripts, share endorsed purge procedures, and flag queries that trigger Error 1375 before they reach production.
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