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f0d4b63bac
Keep track of, for each binlog file, how many open transactions have out-of-band data starting in that file. Then at the start of each new binlog file, in the header page, record the file_no of the earliest file that this file might contain commit records with references back to OOB records in that earlier file. Use this in PURGE BINARY LOGS, so that when a dump thread (slave connection) is active in file number N, and that file (or a later one) may require looking back in an earlier file number M for out-of-band records, purge will stop already at file number M. This way, we avoid that purge accidentally deletes some binlog file that a dump thread would later get an error on because it needs to read out-of-band data. This patch also includes placeholder data for a similar facility for XA references. The actual implementation of support for XA is for later though. Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org> |
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