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Partial fix for Bug#11764622 57480: MEMORY LEAK WHEN HAVING 256+ TABLES

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Port vasil.dimov@oracle.com-20111205082831-7v1qu50hvd9hjr3g from mysql-trunk
This commit is contained in:
Vasil Dimov
2011-12-29 16:12:55 +02:00
parent b7b9a4e810
commit 93ab1d547d
5 changed files with 45 additions and 23 deletions
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20
storage/innobase/btr/btr0pcur.c
View File

@ -52,12 +52,13 @@ btr_pcur_create_for_mysql(void)
}
/**************************************************************//**
Frees the memory for a persistent cursor object. */
Resets a persistent cursor object, freeing ::old_rec_buf if it is
allocated and resetting the other members to their initial values. */
UNIV_INTERN
void
btr_pcur_free_for_mysql(
/*====================*/
btr_pcur_t* cursor) /*!< in, own: persistent cursor */
btr_pcur_reset(
/*===========*/
btr_pcur_t* cursor) /*!< in, out: persistent cursor */
{
if (cursor->old_rec_buf != NULL) {
@ -66,6 +67,7 @@ btr_pcur_free_for_mysql(
cursor->old_rec_buf = NULL;
}
cursor->btr_cur.index = NULL;
cursor->btr_cur.page_cur.rec = NULL;
cursor->old_rec = NULL;
cursor->old_n_fields = 0;
@ -73,7 +75,17 @@ btr_pcur_free_for_mysql(
cursor->latch_mode = BTR_NO_LATCHES;
cursor->pos_state = BTR_PCUR_NOT_POSITIONED;
}
/**************************************************************//**
Frees the memory for a persistent cursor object. */
UNIV_INTERN
void
btr_pcur_free_for_mysql(
/*====================*/
btr_pcur_t* cursor) /*!< in, own: persistent cursor */
{
btr_pcur_reset(cursor);
mem_free(cursor);
}

10
storage/innobase/include/btr0pcur.h
View File

@ -53,6 +53,16 @@ UNIV_INTERN
btr_pcur_t*
btr_pcur_create_for_mysql(void);
/*============================*/
/**************************************************************//**
Resets a persistent cursor object, freeing ::old_rec_buf if it is
allocated and resetting the other members to their initial values. */
UNIV_INTERN
void
btr_pcur_reset(
/*===========*/
btr_pcur_t* cursor);/*!< in, out: persistent cursor */
/**************************************************************//**
Frees the memory for a persistent cursor object. */
UNIV_INTERN

4
storage/innobase/include/row0mysql.h
View File

@ -674,9 +674,9 @@ struct row_prebuilt_struct {
in inserts */
que_fork_t* upd_graph; /*!< Innobase SQL query graph used
in updates or deletes */
btr_pcur_t* pcur; /*!< persistent cursor used in selects
btr_pcur_t pcur; /*!< persistent cursor used in selects
and updates */
btr_pcur_t* clust_pcur; /*!< persistent cursor used in
btr_pcur_t clust_pcur; /*!< persistent cursor used in
some selects and updates */
que_fork_t* sel_graph; /*!< dummy query graph used in
selects */

18
storage/innobase/row/row0mysql.c
View File

@ -730,8 +730,8 @@ row_create_prebuilt(
prebuilt->sql_stat_start = TRUE;
prebuilt->heap = heap;
prebuilt->pcur = btr_pcur_create_for_mysql();
prebuilt->clust_pcur = btr_pcur_create_for_mysql();
btr_pcur_reset(&prebuilt->pcur);
btr_pcur_reset(&prebuilt->clust_pcur);
prebuilt->select_lock_type = LOCK_NONE;
prebuilt->stored_select_lock_type = 99999999;
@ -792,8 +792,8 @@ row_prebuilt_free(
prebuilt->magic_n = ROW_PREBUILT_FREED;
prebuilt->magic_n2 = ROW_PREBUILT_FREED;
btr_pcur_free_for_mysql(prebuilt->pcur);
btr_pcur_free_for_mysql(prebuilt->clust_pcur);
btr_pcur_reset(&prebuilt->pcur);
btr_pcur_reset(&prebuilt->clust_pcur);
if (prebuilt->mysql_template) {
mem_free(prebuilt->mysql_template);
@ -1453,11 +1453,11 @@ row_update_for_mysql(
clust_index = dict_table_get_first_index(table);
if (prebuilt->pcur->btr_cur.index == clust_index) {
btr_pcur_copy_stored_position(node->pcur, prebuilt->pcur);
if (prebuilt->pcur.btr_cur.index == clust_index) {
btr_pcur_copy_stored_position(node->pcur, &prebuilt->pcur);
} else {
btr_pcur_copy_stored_position(node->pcur,
prebuilt->clust_pcur);
&prebuilt->clust_pcur);
}
ut_a(node->pcur->rel_pos == BTR_PCUR_ON);
@ -1561,8 +1561,8 @@ row_unlock_for_mysql(
clust_pcur, and we do not need
to reposition the cursors. */
{
btr_pcur_t* pcur = prebuilt->pcur;
btr_pcur_t* clust_pcur = prebuilt->clust_pcur;
btr_pcur_t* pcur = &prebuilt->pcur;
btr_pcur_t* clust_pcur = &prebuilt->clust_pcur;
trx_t* trx = prebuilt->trx;
ut_ad(prebuilt && trx);

16
storage/innobase/row/row0sel.c
View File

@ -2915,17 +2915,17 @@ row_sel_get_clust_rec_for_mysql(
btr_pcur_open_with_no_init(clust_index, prebuilt->clust_ref,
PAGE_CUR_LE, BTR_SEARCH_LEAF,
prebuilt->clust_pcur, 0, mtr);
&prebuilt->clust_pcur, 0, mtr);
clust_rec = btr_pcur_get_rec(prebuilt->clust_pcur);
clust_rec = btr_pcur_get_rec(&prebuilt->clust_pcur);
prebuilt->clust_pcur->trx_if_known = trx;
prebuilt->clust_pcur.trx_if_known = trx;
/* Note: only if the search ends up on a non-infimum record is the
low_match value the real match to the search tuple */
if (!page_rec_is_user_rec(clust_rec)
|| btr_pcur_get_low_match(prebuilt->clust_pcur)
|| btr_pcur_get_low_match(&prebuilt->clust_pcur)
< dict_index_get_n_unique(clust_index)) {
/* In a rare case it is possible that no clust rec is found
@ -2974,7 +2974,7 @@ row_sel_get_clust_rec_for_mysql(
we set a LOCK_REC_NOT_GAP type lock */
err = lock_clust_rec_read_check_and_lock(
0, btr_pcur_get_block(prebuilt->clust_pcur),
0, btr_pcur_get_block(&prebuilt->clust_pcur),
clust_rec, clust_index, *offsets,
prebuilt->select_lock_type, LOCK_REC_NOT_GAP, thr);
switch (err) {
@ -3052,7 +3052,7 @@ func_exit:
/* We may use the cursor in update or in unlock_row():
store its position */
btr_pcur_store_position(prebuilt->clust_pcur, mtr);
btr_pcur_store_position(&prebuilt->clust_pcur, mtr);
}
err_exit:
@ -3300,7 +3300,7 @@ row_sel_try_search_shortcut_for_mysql(
{
dict_index_t* index = prebuilt->index;
const dtuple_t* search_tuple = prebuilt->search_tuple;
btr_pcur_t* pcur = prebuilt->pcur;
btr_pcur_t* pcur = &prebuilt->pcur;
trx_t* trx = prebuilt->trx;
const rec_t* rec;
@ -3389,7 +3389,7 @@ row_search_for_mysql(
dict_index_t* index = prebuilt->index;
ibool comp = dict_table_is_comp(index->table);
const dtuple_t* search_tuple = prebuilt->search_tuple;
btr_pcur_t* pcur = prebuilt->pcur;
btr_pcur_t* pcur = &prebuilt->pcur;
trx_t* trx = prebuilt->trx;
dict_index_t* clust_index;
que_thr_t* thr;