#include <trx0purge.h>
Public Attributes | |
ulint | state |
sess_t * | sess |
trx_t * | trx |
que_t * | query |
rw_lock_t | latch |
read_view_t * | view |
mutex_t | mutex |
ulint | n_pages_handled |
ulint | handle_limit |
trx_id_t | purge_trx_no |
undo_no_t | purge_undo_no |
ibool | next_stored |
trx_rseg_t * | rseg |
ulint | page_no |
ulint | offset |
ulint | hdr_page_no |
ulint | hdr_offset |
trx_undo_arr_t * | arr |
mem_heap_t * | heap |
The control structure used in the purge operation
Definition at line 128 of file trx0purge.h.
Array of transaction numbers and undo numbers of the undo records currently under processing in purge
Definition at line 177 of file trx0purge.h.
Referenced by trx_purge_sys_close(), and trx_purge_sys_create().
Target of how many pages to get processed in the current purge
Definition at line 148 of file trx0purge.h.
Referenced by trx_purge(), and trx_purge_fetch_next_rec().
Header byte offset on the page
Definition at line 175 of file trx0purge.h.
Referenced by trx_purge_sys_print().
Header page of the undo log where the next record to purge belongs
Definition at line 173 of file trx0purge.h.
Referenced by trx_purge_sys_print().
Temporary storage used during a purge: can be emptied after purge completes
Definition at line 180 of file trx0purge.h.
Referenced by trx_purge(), trx_purge_sys_close(), and trx_purge_sys_create().
The latch protecting the purge view. A purge operation must acquire an x-latch here for the instant at which it changes the purge view: an undo log operation can prevent this by obtaining an s-latch here.
Definition at line 137 of file trx0purge.h.
Referenced by row_vers_build_for_consistent_read(), row_vers_build_for_semi_consistent_read(), row_vers_impl_x_locked_off_kernel(), row_vers_must_preserve_del_marked(), row_vers_old_has_index_entry(), trx_purge(), trx_purge_sys_close(), trx_purge_sys_create(), trx_purge_update_undo_must_exist(), trx_undo_get_undo_rec(), and trx_undo_prev_version_build().
Mutex protecting the fields below
Definition at line 145 of file trx0purge.h.
Referenced by trx_purge(), trx_purge_fetch_next_rec(), trx_purge_rec_release(), trx_purge_sys_close(), and trx_purge_sys_create().
Approximate number of undo log pages processed in purge
Definition at line 146 of file trx0purge.h.
Referenced by trx_purge(), trx_purge_fetch_next_rec(), and trx_purge_sys_create().
TRUE if the info of the next record to purge is stored below: if yes, then the transaction number and the undo number of the record are stored in purge_trx_no and purge_undo_no above
Definition at line 160 of file trx0purge.h.
Referenced by trx_purge_fetch_next_rec(), trx_purge_sys_create(), and trx_purge_sys_print().
ulint trx_purge_struct::offset |
Page offset for the next undo record to purge, 0 if the dummy record
Definition at line 170 of file trx0purge.h.
Referenced by trx_purge_fetch_next_rec(), and trx_purge_sys_print().
Page number for the next undo record to purge, page number of the log header, if dummy record
Definition at line 167 of file trx0purge.h.
Referenced by trx_purge_fetch_next_rec(), and trx_purge_sys_print().
Purge has advanced past all transactions whose number is less than this
Definition at line 154 of file trx0purge.h.
Referenced by lock_print_info_summary(), trx_purge_fetch_next_rec(), trx_purge_sys_create(), and trx_purge_sys_print().
Purge has advanced past all records whose undo number is less than this
Definition at line 157 of file trx0purge.h.
Referenced by lock_print_info_summary(), trx_purge_fetch_next_rec(), trx_purge_sys_create(), and trx_purge_sys_print().
The query graph which will do the parallelized purge operation
Definition at line 135 of file trx0purge.h.
Referenced by trx_purge(), trx_purge_sys_close(), and trx_purge_sys_create().
Rollback segment for the next undo record to purge
Definition at line 165 of file trx0purge.h.
Referenced by trx_purge_fetch_next_rec().
System session running the purge query
Definition at line 130 of file trx0purge.h.
Referenced by trx_purge_sys_close(), and trx_purge_sys_create().
ulint trx_purge_struct::state |
Purge system state
Definition at line 129 of file trx0purge.h.
Referenced by trx_purge(), trx_purge_fetch_next_rec(), and trx_purge_sys_create().
System transaction running the purge query: this trx is not in the trx list of the trx system and it never ends
Definition at line 132 of file trx0purge.h.
Referenced by trx_purge(), and trx_purge_sys_create().
The purge will not remove undo logs which are >= this view (purge view)
Definition at line 143 of file trx0purge.h.
Referenced by trx_purge(), trx_purge_fetch_next_rec(), trx_purge_sys_close(), trx_purge_sys_create(), trx_purge_sys_print(), and trx_purge_update_undo_must_exist().