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mdbx: MDBX_ALLOC_KICK for freelist backlog.

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Tries to sync only when all pages was allocated,
but not every time reclaiming had stopped at weak checkpoint.

Change-Id: I0b41fd87f1eab4725379a17fc29e16820122467d
This commit is contained in:
Leo Yuriev 2016-05-06 04:51:01 +03:00
parent 65354dcd01
commit f70d6638c5
1 changed files with 14 additions and 12 deletions
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26
mdb.c
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@ -1981,6 +1981,7 @@ mdbx_oomkick(MDB_env *env, txnid_t oldest)
#if MDBX_MODE_ENABLED
int retry;
txnid_t snap;
mdb_debug("DB size maxed out");
for(retry = 0; ; ++retry) {
int reader;
@ -2069,7 +2070,8 @@ mdb_page_dirty(MDB_txn *txn, MDB_page *mp)
#define MDBX_ALLOC_CACHE 1
#define MDBX_ALLOC_GC 2
#define MDBX_ALLOC_NEW 4
#define MDBX_ALLOC_ALL (MDBX_ALLOC_CACHE|MDBX_ALLOC_GC|MDBX_ALLOC_NEW)
#define MDBX_ALLOC_KICK 8
#define MDBX_ALLOC_ALL (MDBX_ALLOC_CACHE|MDBX_ALLOC_GC|MDBX_ALLOC_NEW|MDBX_ALLOC_KICK)
static int
mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp, int flags)
@ -2090,7 +2092,7 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp, int flags)
if (unlikely(mc->mc_flags & C_RECLAIMING)) {
/* If mc is updating the freeDB, then the freelist cannot play
* catch-up with itself by growing while trying to save it. */
flags &= ~(MDBX_ALLOC_GC | MDBX_COALESCE | MDBX_LIFORECLAIM);
flags &= ~(MDBX_ALLOC_GC | MDBX_ALLOC_KICK | MDBX_COALESCE | MDBX_LIFORECLAIM);
}
}
@ -2284,18 +2286,18 @@ mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp, int flags)
} while (--i > n2);
}
/* Use new pages from the map when nothing suitable in the freeDB */
i = 0;
rc = MDB_NOTFOUND;
if (likely(flags & MDBX_ALLOC_NEW)) {
/* Use new pages from the map when nothing suitable in the freeDB */
pgno = txn->mt_next_pgno;
if (likely(pgno + num <= env->me_maxpg))
pgno = txn->mt_next_pgno;
rc = MDB_MAP_FULL;
if (likely(pgno + num <= env->me_maxpg)) {
rc = MDB_NOTFOUND;
if (likely(flags & MDBX_ALLOC_NEW))
goto done;
mdb_debug("DB size maxed out");
rc = MDB_MAP_FULL;
}
if (flags & MDBX_ALLOC_GC) {
if ((flags & MDBX_ALLOC_GC)
&& ((flags & MDBX_ALLOC_KICK) || rc == MDB_MAP_FULL)) {
MDB_meta* head = mdb_meta_head_w(env);
MDB_meta* tail = mdb_env_meta_flipflop(env, head);
@ -3450,8 +3452,8 @@ again:
if (lifo) {
if (refill_idx > (txn->mt_lifo_reclaimed ? txn->mt_lifo_reclaimed[0] : 0)) {
/* LY: need more just a txn-id for save page list. */
rc = mdb_page_alloc(&mc, 0, NULL, MDBX_ALLOC_GC);
/* LY: need just a txn-id for save page list. */
rc = mdb_page_alloc(&mc, 0, NULL, MDBX_ALLOC_GC | MDBX_ALLOC_KICK);
if (likely(rc == 0))
/* LY: ok, reclaimed from freedb. */
continue;