diff options
Diffstat (limited to 'storage')
| -rw-r--r-- | storage/innobase/btr/btr0cur.cc | 16 | ||||
| -rw-r--r-- | storage/innobase/page/page0cur.cc | 10 |
2 files changed, 24 insertions, 2 deletions
diff --git a/storage/innobase/btr/btr0cur.cc b/storage/innobase/btr/btr0cur.cc index 04ee06bf032..027ef598d50 100644 --- a/storage/innobase/btr/btr0cur.cc +++ b/storage/innobase/btr/btr0cur.cc @@ -2847,6 +2847,7 @@ btr_cur_open_at_index_side( return err; } extern unsigned long long my_counter; +ulint get_last_nth(); /**********************************************************************//** Positions a cursor at a randomly chosen position within a B-tree. @return DB_SUCCESS if the index is available and we have put the cursor, @@ -2952,8 +2953,10 @@ btr_cur_open_at_rnd_pos( } height = ULINT_UNDEFINED; + fprintf(stderr, "SAMPLE root page_id=%d\n", page_id.page_no()); for (;;) { + bool root= false; page_t* page; ut_ad(n_blocks < BTR_MAX_LEVELS); @@ -3012,6 +3015,7 @@ btr_cur_open_at_rnd_pos( /* We are in the root node */ height = btr_page_get_level(page); + root= true; } else { if(sim_uniform_dist) { ulint n_recs = page_get_n_recs(block->page.frame); @@ -3059,6 +3063,12 @@ btr_cur_open_at_rnd_pos( page_cur_open_on_rnd_user_rec(block, page_cursor); + fprintf(stderr, "SAMPLE node=%x root=%d p=%lf height=%ld size=%d child_no=%ld ", + page_id.page_no(), root, + p, + height, + page_get_n_recs(block->page.frame), + get_last_nth()); if (height == 0) { break; @@ -3145,6 +3155,8 @@ btr_cur_open_at_rnd_pos( page_id.set_page_no( btr_node_ptr_get_child_page_no(node_ptr, offsets)); + fprintf(stderr, "child_page=%x\n", page_id.page_no()); + n_blocks++; } @@ -3156,10 +3168,12 @@ btr_cur_open_at_rnd_pos( // getting 0..1 pseudo random number from ut_rnd_gen() // and exchange division by multiplication like // (b / c) < a <=> b < (a * c) - if(sim_uniform_dist && (ut_rnd_gen() < (p * ~(uint32_t)0))) { + if(sim_uniform_dist && (ut_rnd_gen() > (p * ~(uint32_t)0))) { err = DB_RECORD_NOT_FOUND; my_counter++; + fprintf(stderr, "REJECT\n"); } + else fprintf(stderr, "\n"); return err; } diff --git a/storage/innobase/page/page0cur.cc b/storage/innobase/page/page0cur.cc index 41ae2638f47..ea5bd0da007 100644 --- a/storage/innobase/page/page0cur.cc +++ b/storage/innobase/page/page0cur.cc @@ -764,6 +764,13 @@ up_rec_match: } #endif /* BTR_CUR_HASH_ADAPT */ + +thread_local ulint last_nth; +ulint get_last_nth() +{ + return last_nth; +} + /***********************************************************//** Positions a page cursor on a randomly chosen user record on a page. If there are no user records, sets the cursor on the infimum record. */ @@ -782,8 +789,9 @@ page_cur_open_on_rnd_user_rec( return; } + last_nth= ut_rnd_interval(n_recs) + 1; cursor->rec = page_rec_get_nth(block->page.frame, - ut_rnd_interval(n_recs) + 1); + last_nth); } /** |