/********************************************************************//**
Adds the update undo log as the first log in the history list. Removes the
update undo log segment from the rseg slot if it is too big for reuse. */
UNIV_INTERN
void
trx_purge_add_update_undo_to_history(
/*=================================*/
trx_t* trx, /*!< in: transaction */
page_t* undo_page, /*!< in: update undo log header page,
x-latched */
mtr_t* mtr) /*!< in: mtr */
{
trx_undo_t* undo;
trx_rsegf_t* rseg_header;
trx_ulogf_t* undo_header;
undo = trx->update_undo;
ut_ad(undo);
ut_ad(mutex_own(&undo->rseg->mutex));
rseg_header = trx_rsegf_get(
undo->rseg->space, undo->rseg->zip_size, undo->rseg->page_no,
mtr);
undo_header = undo_page + undo->hdr_offset;
/* Add the log as the first in the history list */
if (undo->state != TRX_UNDO_CACHED) {
ulint hist_size;
#ifdef UNIV_DEBUG
trx_usegf_t* seg_header = undo_page + TRX_UNDO_SEG_HDR;
#endif /* UNIV_DEBUG */
/* The undo log segment will not be reused */
if (UNIV_UNLIKELY(undo->id >= TRX_RSEG_N_SLOTS)) {
fprintf(stderr,
"InnoDB: Error: undo->id is %lu\n",
(ulong) undo->id);
ut_error;
}
trx_rsegf_set_nth_undo(rseg_header, undo->id, FIL_NULL, mtr);
hist_size = mtr_read_ulint(
rseg_header + TRX_RSEG_HISTORY_SIZE, MLOG_4BYTES, mtr);
ut_ad(undo->size == flst_get_len(
seg_header + TRX_UNDO_PAGE_LIST, mtr));
mlog_write_ulint(
rseg_header + TRX_RSEG_HISTORY_SIZE,
hist_size + undo->size, MLOG_4BYTES, mtr);
}
flst_add_first(
rseg_header + TRX_RSEG_HISTORY,
undo_header + TRX_UNDO_HISTORY_NODE, mtr);
/* Write the trx number to the undo log header */
mlog_write_ull(undo_header + TRX_UNDO_TRX_NO, trx->no, mtr);
/* Write information about delete markings to the undo log header */
if (!undo->del_marks) {
mlog_write_ulint(
undo_header + TRX_UNDO_DEL_MARKS, FALSE,
MLOG_2BYTES, mtr);
}
if (undo->rseg->last_page_no == FIL_NULL) {
undo->rseg->last_trx_no = trx->no;
undo->rseg->last_offset = undo->hdr_offset;
undo->rseg->last_page_no = undo->hdr_page_no;
undo->rseg->last_del_marks = undo->del_marks;
/* FIXME: Add a bin heap validate function to check that
the rseg exists. */
}
mutex_enter(&kernel_mutex);
trx_sys->rseg_history_len++;
mutex_exit(&kernel_mutex);
// if (!(trx_sys->rseg_history_len % srv_purge_batch_size)) { /*should wake up always*/
/* Inform the purge thread that there is work to do. */
srv_wake_purge_thread_if_not_active();
// }
}
/********************************************************************//**
Adds the update undo log as the first log in the history list. Removes the
update undo log segment from the rseg slot if it is too big for reuse. */
UNIV_INTERN
void
trx_purge_add_update_undo_to_history(
/*=================================*/
trx_t* trx, /*!< in: transaction */
page_t* undo_page, /*!< in: update undo log header page,
x-latched */
mtr_t* mtr) /*!< in: mtr */
{
trx_undo_t* undo;
trx_rseg_t* rseg;
trx_rsegf_t* rseg_header;
#ifdef UNIV_DEBUG
trx_usegf_t* seg_header;
#endif /* UNIV_DEBUG */
trx_ulogf_t* undo_header;
ulint hist_size;
undo = trx->update_undo;
ut_ad(undo);
rseg = undo->rseg;
ut_ad(mutex_own(&(rseg->mutex)));
rseg_header = trx_rsegf_get(rseg->space, rseg->zip_size,
rseg->page_no, mtr);
undo_header = undo_page + undo->hdr_offset;
#ifdef UNIV_DEBUG
seg_header = undo_page + TRX_UNDO_SEG_HDR;
#endif /* UNIV_DEBUG */
if (undo->state != TRX_UNDO_CACHED) {
/* The undo log segment will not be reused */
if (undo->id >= TRX_RSEG_N_SLOTS) {
fprintf(stderr,
"InnoDB: Error: undo->id is %lu\n",
(ulong) undo->id);
ut_error;
}
trx_rsegf_set_nth_undo(rseg_header, undo->id, FIL_NULL, mtr);
hist_size = mtr_read_ulint(rseg_header + TRX_RSEG_HISTORY_SIZE,
MLOG_4BYTES, mtr);
ut_ad(undo->size == flst_get_len(
seg_header + TRX_UNDO_PAGE_LIST, mtr));
mlog_write_ulint(rseg_header + TRX_RSEG_HISTORY_SIZE,
hist_size + undo->size, MLOG_4BYTES, mtr);
}
/* Add the log as the first in the history list */
flst_add_first(rseg_header + TRX_RSEG_HISTORY,
undo_header + TRX_UNDO_HISTORY_NODE, mtr);
mutex_enter(&kernel_mutex);
trx_sys->rseg_history_len++;
mutex_exit(&kernel_mutex);
/* Write the trx number to the undo log header */
mlog_write_dulint(undo_header + TRX_UNDO_TRX_NO, trx->no, mtr);
/* Write information about delete markings to the undo log header */
if (!undo->del_marks) {
mlog_write_ulint(undo_header + TRX_UNDO_DEL_MARKS, FALSE,
MLOG_2BYTES, mtr);
}
if (rseg->last_page_no == FIL_NULL) {
rseg->last_page_no = undo->hdr_page_no;
rseg->last_offset = undo->hdr_offset;
rseg->last_trx_no = trx->no;
rseg->last_del_marks = undo->del_marks;
}
}