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#0 my_delete (name=0x7ffff0fa0490 "./binlog.000005", MyFlags=0) at /root/softm/percona-server-5.7.22-22/mysys/my_delete.c:25#1 0x000000000186416f in inline_mysql_file_delete (key=2, src_file=0x2293340 "/root/softm/percona-server-5.7.22-22/sql/binlog.cc", src_line=6735, name=0x7ffff0fa0490 "./binlog.000005", flags=0) at /root/softm/percona-server-5.7.22-22/include/mysql/psi/mysql_file.h:1331#2 0x0000000001871497 in MYSQL_BIN_LOG::purge_index_entry (this=0x2e39c40, thd=0x7fffa4000b70, decrease_log_space=0x0, need_lock_index=false) at /root/softm/percona-server-5.7.22-22/sql/binlog.cc:6735#3 0x0000000001870b35 in MYSQL_BIN_LOG::purge_logs (this=0x2e39c40, to_log=0x7ffff0fa0a80 "./binlog.000007", included=false, need_lock_index=true, need_update_threads=true, decrease_log_space=0x0, auto_purge=false) at /root/softm/percona-server-5.7.22-22/sql/binlog.cc:6495#4 0x0000000001868839 in purge_master_logs (thd=0x7fffa4000b70, to_log=0x7fffa4006570 "binlog.000007") at /root/softm/percona-server-5.7.22-22/sql/binlog.cc:3127#5 0x00000000015b7874 in mysql_execute_command (thd=0x7fffa4000b70, first_level=true) at /root/softm/percona-server-5.7.22-22/sql/sql_parse.cc:2989#6 0x00000000015c0362 in mysql_parse (thd=0x7fffa4000b70, parser_state=0x7ffff0fa2600) at /root/softm/percona-server-5.7.22-22/sql/sql_parse.cc:5901#7 0x00000000015b3ef6 in dispatch_command (thd=0x7fffa4000b70, com_data=0x7ffff0fa2d70, command=COM_QUERY) at /root/softm/percona-server-5.7.22-22/sql/sql_parse.cc:1490#8 0x00000000015b2c83 in do_command (thd=0x7fffa4000b70) at /root/softm/percona-server-5.7.22-22/sql/sql_parse.cc:1021#9 0x00000000016fb8fc in handle_connection (arg=0x38f2910) at /root/softm/percona-server-5.7.22-22/sql/conn_handler/connection_handler_per_thread.cc:312#10 0x0000000001932112 in pfs_spawn_thread (arg=0x3860a50) at /root/softm/percona-server-5.7.22-22/storage/perfschema/pfs.cc:2190#11 0x00007ffff7bc6aa1 in start_thread () from /lib64/libpthread.so.0#12 0x00007ffff6719bcd in clone () from /lib64/libc.so.6
整个删除过程大概是:
下面是中间时刻的文件列表。
-rw-r----- 1 root root 80 Jun 26 10:25 binlog.index-rw-r----- 1 root root 32 Jun 26 10:38 binlog.~rec~-rw-r----- 1 root root 48 Jun 26 10:39 binlog.index_crash_safe
下面是我的debug中的一部分:
(gdb) p purge_index_file->file $6 = 61OS中我们可以看到这个文件描述符为61 -> /root/softm/percona-server-5.7.22-22/mysql-test/var/mysqld.1/data/binlog.~rec~