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MDEV-14756 - Remove trx_sys_t::rw_trx_list

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Reduce divergence between trx_sys_t::rw_trx_hash and trx_sys_t::rw_trx_list
by not adding recovered COMMITTED transactions to trx_sys_t::rw_trx_list.

Such transactions are discarded immediately without creating trx object.

This also required to split rollback and cleanup phases of recovery. To
reflect these updates the following renames happened:
trx_rollback_or_clean_all_recovered() -> trx_rollback_all_recovered()
trx_rollback_or_clean_is_active -> trx_rollback_is_active
trx_rollback_or_clean_recovered() -> trx_rollback_recovered()
trx_cleanup_at_db_startup() -> trx_cleanup_recovered()

Also removed a hack from lock_trx_release_locks(). Instead let recovery
rollback thread to skip committed XA transactions.
This commit is contained in:
Sergey Vojtovich 2017-12-21 15:45:40 +04:00
commit d09f146934
12 changed files with 144 additions and 321 deletions
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2
storage/innobase/trx/trx0undo.cc
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@ -1643,7 +1643,6 @@ trx_undo_free_prepared(
/* fall through */
case TRX_UNDO_ACTIVE:
/* lock_trx_release_locks() assigns
trx->is_recovered=false and
trx->state = TRX_STATE_COMMITTED_IN_MEMORY,
also for transactions that we faked
to TRX_STATE_PREPARED in trx_rollback_resurrected(). */
@ -1673,7 +1672,6 @@ trx_undo_free_prepared(
/* fall through */
case TRX_UNDO_ACTIVE:
/* lock_trx_release_locks() assigns
trx->is_recovered=false and
trx->state = TRX_STATE_COMMITTED_IN_MEMORY,
also for transactions that we faked
to TRX_STATE_PREPARED in trx_rollback_resurrected(). */