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Remove unneeded field from VACUUM state. 

Bugfix commit 5fc89376 effectively made the lock_waiter_detected field
from vacuumlazy.c's global state struct into private state owned by
lazy_truncate_heap().  Finish this off by replacing the struct field
with a local variable.
This commit is contained in:
Peter Geoghegan 2021-06-15 08:59:36 -07:00
parent ad2da246c6
commit 958cfbcf2d
1 changed files with 9 additions and 10 deletions
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19
src/backend/access/heap/vacuumlazy.c
View File

@ -351,7 +351,6 @@ typedef struct LVRelState
BlockNumber pages_removed; /* pages remove by truncation */
BlockNumber lpdead_item_pages; /* # pages with LP_DEAD items */
BlockNumber nonempty_pages; /* actually, last nonempty page + 1 */
bool lock_waiter_detected;
/* Statistics output by us, for table */
double new_rel_tuples; /* new estimated total # of tuples */
@ -439,7 +438,8 @@ static IndexBulkDeleteResult *lazy_cleanup_one_index(Relation indrel,
static bool should_attempt_truncation(LVRelState *vacrel,
VacuumParams *params);
static void lazy_truncate_heap(LVRelState *vacrel);
static BlockNumber count_nondeletable_pages(LVRelState *vacrel);
static BlockNumber count_nondeletable_pages(LVRelState *vacrel,
bool *lock_waiter_detected);
static long compute_max_dead_tuples(BlockNumber relblocks, bool hasindex);
static void lazy_space_alloc(LVRelState *vacrel, int nworkers,
BlockNumber relblocks);
@ -929,7 +929,6 @@ lazy_scan_heap(LVRelState *vacrel, VacuumParams *params, bool aggressive)
vacrel->pages_removed = 0;
vacrel->lpdead_item_pages = 0;
vacrel->nonempty_pages = 0;
vacrel->lock_waiter_detected = false;
/* Initialize instrumentation counters */
vacrel->num_index_scans = 0;
@ -3165,6 +3164,7 @@ lazy_truncate_heap(LVRelState *vacrel)
{
BlockNumber old_rel_pages = vacrel->rel_pages;
BlockNumber new_rel_pages;
bool lock_waiter_detected;
int lock_retry;
/* Report that we are now truncating */
@ -3187,7 +3187,7 @@ lazy_truncate_heap(LVRelState *vacrel)
* (which is quite possible considering we already hold a lower-grade
* lock).
*/
vacrel->lock_waiter_detected = false;
lock_waiter_detected = false;
lock_retry = 0;
while (true)
{
@ -3207,7 +3207,7 @@ lazy_truncate_heap(LVRelState *vacrel)
* We failed to establish the lock in the specified number of
* retries. This means we give up truncating.
*/
vacrel->lock_waiter_detected = true;
lock_waiter_detected = true;
ereport(elevel,
(errmsg("\"%s\": stopping truncate due to conflicting lock request",
vacrel->relname)));
@ -3242,7 +3242,7 @@ lazy_truncate_heap(LVRelState *vacrel)
* other backends could have added tuples to these pages whilst we
* were vacuuming.
*/
new_rel_pages = count_nondeletable_pages(vacrel);
new_rel_pages = count_nondeletable_pages(vacrel, &lock_waiter_detected);
vacrel->blkno = new_rel_pages;
if (new_rel_pages >= old_rel_pages)
@ -3281,8 +3281,7 @@ lazy_truncate_heap(LVRelState *vacrel)
errdetail_internal("%s",
pg_rusage_show(&ru0))));
old_rel_pages = new_rel_pages;
} while (new_rel_pages > vacrel->nonempty_pages &&
vacrel->lock_waiter_detected);
} while (new_rel_pages > vacrel->nonempty_pages && lock_waiter_detected);
}
/*
@ -3291,7 +3290,7 @@ lazy_truncate_heap(LVRelState *vacrel)
* Returns number of nondeletable pages (last nonempty page + 1).
*/
static BlockNumber
count_nondeletable_pages(LVRelState *vacrel)
count_nondeletable_pages(LVRelState *vacrel, bool *lock_waiter_detected)
{
BlockNumber blkno;
BlockNumber prefetchedUntil;
@ -3343,7 +3342,7 @@ count_nondeletable_pages(LVRelState *vacrel)
(errmsg("\"%s\": suspending truncate due to conflicting lock request",
vacrel->relname)));
vacrel->lock_waiter_detected = true;
*lock_waiter_detected = true;
return blkno;
}
starttime = currenttime;