void
buf_read_ibuf_merge_pages(
/*======================*/
ibool sync, /* in: TRUE if the caller wants this function
to wait for the highest address page to get
read in, before this function returns */
ulint* space_ids, /* in: array of space ids */
ib_longlong* space_versions,/* in: the spaces must have this version
number (timestamp), otherwise we discard the
read; we use this to cancel reads if
DISCARD + IMPORT may have changed the
tablespace size */
ulint* page_nos, /* in: array of page numbers to read, with the
highest page number the last in the array */
ulint n_stored) /* in: number of page numbers in the array */
{
ulint err;
ulint i;
ut_ad(!ibuf_inside());
#ifdef UNIV_IBUF_DEBUG
ut_a(n_stored < UNIV_PAGE_SIZE);
#endif
while (buf_pool->n_pend_reads
> buf_pool->curr_size / BUF_READ_AHEAD_PEND_LIMIT) {
os_thread_sleep(500000);
}
for (i = 0; i < n_stored; i++) {
buf_read_page_low(&err,
(i + 1 == n_stored) && sync,
BUF_READ_ANY_PAGE,
space_ids[i], space_versions[i],
page_nos[i]);
if (err == DB_TABLESPACE_DELETED) {
/* We have deleted or are deleting the single-table
tablespace: remove the entries for that page */
ibuf_merge_or_delete_for_page(NULL, space_ids[i],
page_nos[i], FALSE);
}
}
os_aio_simulated_wake_handler_threads();
/* Flush pages from the end of the LRU list if necessary */
buf_flush_free_margin();
#ifdef UNIV_DEBUG
if (buf_debug_prints) {
fprintf(stderr,
"Ibuf merge read-ahead space %lu pages %lu\n",
(ulong) space_ids[0], (ulong) n_stored);
}
#endif /* UNIV_DEBUG */
}
/********************************************************************//**
Issues read requests for pages which the ibuf module wants to read in, in
order to contract the insert buffer tree. Technically, this function is like
a read-ahead function. */
UNIV_INTERN
void
buf_read_ibuf_merge_pages(
/*======================*/
ibool sync, /*!< in: TRUE if the caller
wants this function to wait
for the highest address page
to get read in, before this
function returns */
const ulint* space_ids, /*!< in: array of space ids */
const ib_int64_t* space_versions,/*!< in: the spaces must have
this version number
(timestamp), otherwise we
discard the read; we use this
to cancel reads if DISCARD +
IMPORT may have changed the
tablespace size */
const ulint* page_nos, /*!< in: array of page numbers
to read, with the highest page
number the last in the
array */
ulint n_stored) /*!< in: number of elements
in the arrays */
{
ulint i;
#ifdef UNIV_IBUF_DEBUG
ut_a(n_stored < UNIV_PAGE_SIZE);
#endif
for (i = 0; i < n_stored; i++) {
ulint err;
buf_pool_t* buf_pool;
ulint zip_size = fil_space_get_zip_size(space_ids[i]);
buf_pool = buf_pool_get(space_ids[i], page_nos[i]);
while (buf_pool->n_pend_reads
> buf_pool->curr_size / BUF_READ_AHEAD_PEND_LIMIT) {
os_thread_sleep(500000);
}
if (UNIV_UNLIKELY(zip_size == ULINT_UNDEFINED)) {
goto tablespace_deleted;
}
buf_read_page_low(&err, sync && (i + 1 == n_stored),
BUF_READ_ANY_PAGE, space_ids[i],
zip_size, TRUE, space_versions[i],
page_nos[i], NULL);
if (UNIV_UNLIKELY(err == DB_TABLESPACE_DELETED)) {
tablespace_deleted:
/* We have deleted or are deleting the single-table
tablespace: remove the entries for that page */
ibuf_merge_or_delete_for_page(NULL, space_ids[i],
page_nos[i],
zip_size, FALSE);
}
}
os_aio_simulated_wake_handler_threads();
/* Flush pages from the end of all the LRU lists if necessary */
buf_flush_free_margins(FALSE);
#ifdef UNIV_DEBUG
if (buf_debug_prints) {
fprintf(stderr,
"Ibuf merge read-ahead space %lu pages %lu\n",
(ulong) space_ids[0], (ulong) n_stored);
}
#endif /* UNIV_DEBUG */
}
