diff options
Diffstat (limited to 'storage/innobase/include/trx0rseg.h')
| -rw-r--r-- | storage/innobase/include/trx0rseg.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/storage/innobase/include/trx0rseg.h b/storage/innobase/include/trx0rseg.h index 78a7a8c4bb0..5acde05de3d 100644 --- a/storage/innobase/include/trx0rseg.h +++ b/storage/innobase/include/trx0rseg.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2011, Innobase Oy. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -113,7 +113,9 @@ void trx_rseg_list_and_array_init( /*=========================*/ trx_sysf_t* sys_header, /*!< in: trx system header */ + ib_bh_t* ib_bh, /*!< in: rseg queue */ mtr_t* mtr); /*!< in: mtr */ + /*************************************************************************** Free's an instance of the rollback segment in memory. */ UNIV_INTERN @@ -141,9 +143,7 @@ struct trx_rseg_struct{ ulint id; /*!< rollback segment id == the index of its slot in the trx system file copy */ mutex_t mutex; /*!< mutex protecting the fields in this - struct except id; NOTE that the latching - order must always be kernel mutex -> - rseg mutex */ + struct except id, which is constant */ ulint space; /*!< space where the rollback segment is header is placed */ ulint zip_size;/* compressed page size of space @@ -182,6 +182,14 @@ struct trx_rseg_struct{ memory objects */ }; +/** For prioritising the rollback segments for purge. */ +struct rseg_queue_struct { + trx_id_t trx_no; /*!< trx_rseg_t::last_trx_no */ + trx_rseg_t* rseg; /*!< Rollback segment */ +}; + +typedef struct rseg_queue_struct rseg_queue_t; + /* Undo log segment slot in a rollback segment header */ /*-------------------------------------------------------------*/ #define TRX_RSEG_SLOT_PAGE_NO 0 /* Page number of the header page of |