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b80df9eba2
buf_read_ibuf_merge_pages(): Discard any page numbers that are outside the current bounds of the tablespace, by invoking the function ibuf_delete_recs() that was introduced in MDEV-20934. This could avoid an infinite change buffer merge loop on innodb_fast_shutdown=0, because normally the change buffer merge would only be attempted if a page was successfully loaded into the buffer pool. dict_drop_index_tree(): Add the parameter trx_t*. To prevent the DROP TABLE crash, do not invoke btr_free_if_exists() if the entire .ibd file will be dropped. Thus, we will avoid a crash if the BTR_SEG_LEAF or BTR_SEG_TOP of the index is corrupted, and we will also avoid unnecessarily accessing the to-be-dropped tablespace via the buffer pool. In MariaDB 10.2, we disable the DROP TABLE fix if innodb_safe_truncate=0, because the backup-unsafe MySQL 5.7 WL#6501 form of TRUNCATE TABLE requires that the individual pages be freed inside the tablespace. |
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| galera | ||
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