Source

sqlalchemy_msabramo_tox / test / aaa_profiling / test_memusage.py

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
from test.lib.testing import eq_
from sqlalchemy.orm import mapper, relationship, create_session, \
    clear_mappers, sessionmaker, class_mapper, aliased,\
    Session, subqueryload
from sqlalchemy.orm.mapper import _mapper_registry
from sqlalchemy.orm.session import _sessions
import operator
from test.lib import testing, engines
from sqlalchemy import MetaData, Integer, String, ForeignKey, \
    PickleType, create_engine, Unicode
from test.lib.schema import Table, Column
import sqlalchemy as sa
from sqlalchemy.sql import column
from sqlalchemy.processors import to_decimal_processor_factory, \
    to_unicode_processor_factory
from test.lib.util import gc_collect
from sqlalchemy.util.compat import decimal
import gc
import weakref
from test.lib import fixtures

class A(fixtures.ComparableEntity):
    pass
class B(fixtures.ComparableEntity):
    pass
class ASub(A):
    pass

def profile_memory(times=50):
    def decorate(func):
        # run the test 50 times.  if length of gc.get_objects()
        # keeps growing, assert false

        def profile(*args):
            gc_collect()
            samples = [0 for x in range(0, times)]
            for x in range(0, times):
                func(*args)
                gc_collect()
                samples[x] = len(gc.get_objects())

            print "sample gc sizes:", samples

            assert len(_sessions) == 0

            for x in samples[-4:]:
                if x != samples[-5]:
                    flatline = False
                    break
            else:
                flatline = True

            # object count is bigger than when it started
            if not flatline and samples[-1] > samples[0]:
                for x in samples[1:-2]:
                    # see if a spike bigger than the endpoint exists
                    if x > samples[-1]:
                        break
                else:
                    assert False, repr(samples) + " " + repr(flatline)

        return profile
    return decorate

def assert_no_mappers():
    clear_mappers()
    gc_collect()
    assert len(_mapper_registry) == 0

class EnsureZeroed(fixtures.ORMTest):
    def setup(self):
        _sessions.clear()
        _mapper_registry.clear()

class MemUsageTest(EnsureZeroed):

    __requires__ = 'cpython',

    # ensure a pure growing test trips the assertion
    @testing.fails_if(lambda: True)
    def test_fixture(self):
        class Foo(object):
            pass

        x = []
        @profile_memory()
        def go():
            x[-1:] = [Foo(), Foo(), Foo(), Foo(), Foo(), Foo()]
        go()

    def test_session(self):
        metadata = MetaData(testing.db)

        table1 = Table("mytable", metadata,
            Column('col1', Integer, primary_key=True,
                                    test_needs_autoincrement=True),
            Column('col2', String(30)))

        table2 = Table("mytable2", metadata,
            Column('col1', Integer, primary_key=True,
                                    test_needs_autoincrement=True),
            Column('col2', String(30)),
            Column('col3', Integer, ForeignKey("mytable.col1")))

        metadata.create_all()

        m1 = mapper(A, table1, properties={
            "bs":relationship(B, cascade="all, delete",
                                    order_by=table2.c.col1)},
            order_by=table1.c.col1)
        m2 = mapper(B, table2)

        m3 = mapper(A, table1, non_primary=True)

        @profile_memory()
        def go():
            sess = create_session()
            a1 = A(col2="a1")
            a2 = A(col2="a2")
            a3 = A(col2="a3")
            a1.bs.append(B(col2="b1"))
            a1.bs.append(B(col2="b2"))
            a3.bs.append(B(col2="b3"))
            for x in [a1,a2,a3]:
                sess.add(x)
            sess.flush()
            sess.expunge_all()

            alist = sess.query(A).all()
            eq_(
                [
                    A(col2="a1", bs=[B(col2="b1"), B(col2="b2")]),
                    A(col2="a2", bs=[]),
                    A(col2="a3", bs=[B(col2="b3")])
                ],
                alist)

            for a in alist:
                sess.delete(a)
            sess.flush()
        go()

        metadata.drop_all()
        del m1, m2, m3
        assert_no_mappers()

    @testing.crashes('sqlite', ':memory: connection not suitable here')
    def test_orm_many_engines(self):
        metadata = MetaData(testing.db)

        table1 = Table("mytable", metadata,
            Column('col1', Integer, primary_key=True,
                            test_needs_autoincrement=True),
            Column('col2', String(30)))

        table2 = Table("mytable2", metadata,
            Column('col1', Integer, primary_key=True,
                            test_needs_autoincrement=True),
            Column('col2', String(30)),
            Column('col3', Integer, ForeignKey("mytable.col1")))

        metadata.create_all()

        m1 = mapper(A, table1, properties={
            "bs":relationship(B, cascade="all, delete",
                                    order_by=table2.c.col1)},
            order_by=table1.c.col1,
            _compiled_cache_size=10
            )
        m2 = mapper(B, table2,
            _compiled_cache_size=10
        )

        m3 = mapper(A, table1, non_primary=True)

        @profile_memory()
        def go():
            engine = engines.testing_engine(
                                options={'logging_name':'FOO',
                                        'pool_logging_name':'BAR',
                                        'use_reaper':False}
                                    )
            sess = create_session(bind=engine)

            a1 = A(col2="a1")
            a2 = A(col2="a2")
            a3 = A(col2="a3")
            a1.bs.append(B(col2="b1"))
            a1.bs.append(B(col2="b2"))
            a3.bs.append(B(col2="b3"))
            for x in [a1,a2,a3]:
                sess.add(x)
            sess.flush()
            sess.expunge_all()

            alist = sess.query(A).all()
            eq_(
                [
                    A(col2="a1", bs=[B(col2="b1"), B(col2="b2")]),
                    A(col2="a2", bs=[]),
                    A(col2="a3", bs=[B(col2="b3")])
                ],
                alist)

            for a in alist:
                sess.delete(a)
            sess.flush()
            sess.close()
            engine.dispose()
        go()

        metadata.drop_all()
        del m1, m2, m3
        assert_no_mappers()

    def test_ad_hoc_types(self):
        """test storage of bind processors, result processors
        in dialect-wide registry."""

        from sqlalchemy.dialects import mysql, postgresql, sqlite
        from sqlalchemy import types

        eng = engines.testing_engine()
        for args in (
            (types.Integer, ),
            (types.String, ),
            (types.PickleType, ),
            (types.Enum, 'a', 'b', 'c'),
            (sqlite.DATETIME, ),
            (postgresql.ENUM, 'a', 'b', 'c'),
            (types.Interval, ),
            (postgresql.INTERVAL, ),
            (mysql.VARCHAR, ),
        ):
            @profile_memory()
            def go():
                type_ = args[0](*args[1:])
                bp = type_._cached_bind_processor(eng.dialect)
                rp = type_._cached_result_processor(eng.dialect, 0)
            go()

        assert not eng.dialect._type_memos


    def test_many_updates(self):
        metadata = MetaData(testing.db)

        wide_table = Table('t', metadata,
            Column('id', Integer, primary_key=True,
                                test_needs_autoincrement=True),
            *[Column('col%d' % i, Integer) for i in range(10)]
        )

        class Wide(object):
            pass

        mapper(Wide, wide_table, _compiled_cache_size=10)

        metadata.create_all()
        session = create_session()
        w1 = Wide()
        session.add(w1)
        session.flush()
        session.close()
        del session
        counter = [1]

        @profile_memory()
        def go():
            session = create_session()
            w1 = session.query(Wide).first()
            x = counter[0]
            dec = 10
            while dec > 0:
                # trying to count in binary here, 
                # works enough to trip the test case
                if pow(2, dec) < x:
                    setattr(w1, 'col%d' % dec, counter[0])
                    x -= pow(2, dec)
                dec -= 1
            session.flush()
            session.close()
            counter[0] += 1

        try:
            go()
        finally:
            metadata.drop_all()

    def test_unicode_warnings(self):
        metadata = MetaData(testing.db)
        table1 = Table('mytable', metadata, Column('col1', Integer,
                       primary_key=True,
                       test_needs_autoincrement=True), Column('col2',
                       Unicode(30)))
        metadata.create_all()
        i = [1]

        # the times here is cranked way up so that we can see
        # pysqlite clearing out it's internal buffer and allow
        # the test to pass
        @testing.emits_warning()
        @profile_memory(times=220)
        def go():

            # execute with a non-unicode object. a warning is emitted,
            # this warning shouldn't clog up memory.

            testing.db.execute(table1.select().where(table1.c.col2
                               == 'foo%d' % i[0]))
            i[0] += 1
        try:
            go()
        finally:
            metadata.drop_all()

    def test_mapper_reset(self):
        metadata = MetaData(testing.db)

        table1 = Table("mytable", metadata,
            Column('col1', Integer, primary_key=True,
                                test_needs_autoincrement=True),
            Column('col2', String(30)))

        table2 = Table("mytable2", metadata,
            Column('col1', Integer, primary_key=True,
                                test_needs_autoincrement=True),
            Column('col2', String(30)),
            Column('col3', Integer, ForeignKey("mytable.col1")))

        @profile_memory()
        def go():
            m1 = mapper(A, table1, properties={
                "bs":relationship(B, order_by=table2.c.col1)
            })
            m2 = mapper(B, table2)

            m3 = mapper(A, table1, non_primary=True)

            sess = create_session()
            a1 = A(col2="a1")
            a2 = A(col2="a2")
            a3 = A(col2="a3")
            a1.bs.append(B(col2="b1"))
            a1.bs.append(B(col2="b2"))
            a3.bs.append(B(col2="b3"))
            for x in [a1,a2,a3]:
                sess.add(x)
            sess.flush()
            sess.expunge_all()

            alist = sess.query(A).order_by(A.col1).all()
            eq_(
                [
                    A(col2="a1", bs=[B(col2="b1"), B(col2="b2")]),
                    A(col2="a2", bs=[]),
                    A(col2="a3", bs=[B(col2="b3")])
                ],
                alist)

            for a in alist:
                sess.delete(a)
            sess.flush()
            sess.close()
            clear_mappers()

        metadata.create_all()
        try:
            go()
        finally:
            metadata.drop_all()
        assert_no_mappers()

    def test_alias_pathing(self):
        metadata = MetaData(testing.db)

        a = Table("a", metadata,
            Column('id', Integer, primary_key=True,
                                test_needs_autoincrement=True),
            Column('bid', Integer, ForeignKey('b.id')),
            Column('type', String(30))
        )

        asub = Table("asub", metadata,
            Column('id', Integer, ForeignKey('a.id'),
                                primary_key=True),
            Column('data', String(30)))

        b = Table("b", metadata,
            Column('id', Integer, primary_key=True,
                                test_needs_autoincrement=True),
        )
        mapper(A, a, polymorphic_identity='a',
            polymorphic_on=a.c.type)
        mapper(ASub, asub, inherits=A,polymorphic_identity='asub')
        m1 = mapper(B, b, properties={
            'as_':relationship(A)
        })

        metadata.create_all()
        sess = Session()
        a1 = ASub(data="a1")
        a2 = ASub(data="a2")
        a3 = ASub(data="a3")
        b1 = B(as_=[a1, a2, a3])
        sess.add(b1)
        sess.commit()
        del sess

        # sqlite has a slow enough growth here
        # that we have to run it more times to see the
        # "dip" again
        @profile_memory(times=120)
        def go():
            sess = Session()
            sess.query(B).options(subqueryload(B.as_.of_type(ASub))).all()
            sess.close()
        try:
            go()
        finally:
            metadata.drop_all()
        clear_mappers()

    def test_path_registry(self):
        metadata = MetaData()
        a = Table("a", metadata,
            Column('id', Integer, primary_key=True),
        )
        m1 = mapper(A, a)
        @profile_memory()
        def go():
            ma = aliased(A)
            m1._sa_path_registry['foo'][ma]['bar']
        go()
        clear_mappers()

    def test_with_inheritance(self):
        metadata = MetaData(testing.db)

        table1 = Table("mytable", metadata,
            Column('col1', Integer, primary_key=True,
                                    test_needs_autoincrement=True),
            Column('col2', String(30))
            )

        table2 = Table("mytable2", metadata,
            Column('col1', Integer, ForeignKey('mytable.col1'),
                   primary_key=True, test_needs_autoincrement=True),
            Column('col3', String(30)),
            )

        @profile_memory()
        def go():
            class A(fixtures.ComparableEntity):
                pass
            class B(A):
                pass

            mapper(A, table1,
                   polymorphic_on=table1.c.col2,
                   polymorphic_identity='a')
            mapper(B, table2,
                   inherits=A,
                   polymorphic_identity='b')

            sess = create_session()
            a1 = A()
            a2 = A()
            b1 = B(col3='b1')
            b2 = B(col3='b2')
            for x in [a1,a2,b1, b2]:
                sess.add(x)
            sess.flush()
            sess.expunge_all()

            alist = sess.query(A).order_by(A.col1).all()
            eq_(
                [
                    A(), A(), B(col3='b1'), B(col3='b2')
                ],
                alist)

            for a in alist:
                sess.delete(a)
            sess.flush()

            # dont need to clear_mappers()
            del B
            del A

        metadata.create_all()
        try:
            go()
        finally:
            metadata.drop_all()
        assert_no_mappers()

    def test_with_manytomany(self):
        metadata = MetaData(testing.db)

        table1 = Table("mytable", metadata,
            Column('col1', Integer, primary_key=True,
                                    test_needs_autoincrement=True),
            Column('col2', String(30))
            )

        table2 = Table("mytable2", metadata,
            Column('col1', Integer, primary_key=True,
                                    test_needs_autoincrement=True),
            Column('col2', String(30)),
            )

        table3 = Table('t1tot2', metadata,
            Column('t1', Integer, ForeignKey('mytable.col1')),
            Column('t2', Integer, ForeignKey('mytable2.col1')),
            )

        @profile_memory()
        def go():
            class A(fixtures.ComparableEntity):
                pass
            class B(fixtures.ComparableEntity):
                pass

            mapper(A, table1, properties={
                'bs':relationship(B, secondary=table3, 
                                    backref='as', order_by=table3.c.t1)
            })
            mapper(B, table2)

            sess = create_session()
            a1 = A(col2='a1')
            a2 = A(col2='a2')
            b1 = B(col2='b1')
            b2 = B(col2='b2')
            a1.bs.append(b1)
            a2.bs.append(b2)
            for x in [a1,a2]:
                sess.add(x)
            sess.flush()
            sess.expunge_all()

            alist = sess.query(A).order_by(A.col1).all()
            eq_(
                [
                    A(bs=[B(col2='b1')]), A(bs=[B(col2='b2')])
                ],
                alist)

            for a in alist:
                sess.delete(a)
            sess.flush()

            # dont need to clear_mappers()
            del B
            del A

        metadata.create_all()
        try:
            go()
        finally:
            metadata.drop_all()
        assert_no_mappers()

    @testing.fails_if(lambda : testing.db.dialect.name == 'sqlite' \
                      and testing.db.dialect.dbapi.version > '2.5')
    @testing.provide_metadata
    def test_key_fallback_result(self):
        e = testing.db
        m = self.metadata
        t = Table('t', m, Column('x', Integer), Column('y', Integer))
        m.create_all(e)
        e.execute(t.insert(), {"x":1, "y":1})
        @profile_memory()
        def go():
            r = e.execute(t.alias().select())
            for row in r:
                row[t.c.x]
        go()

    # fails on newer versions of pysqlite due to unusual memory behvior
    # in pysqlite itself. background at:
    # http://thread.gmane.org/gmane.comp.python.db.pysqlite.user/2290

    @testing.fails_if(lambda : testing.db.dialect.name == 'sqlite' \
                      and testing.db.dialect.dbapi.version > '2.5')
    def test_join_cache(self):
        metadata = MetaData(testing.db)
        table1 = Table('table1', metadata, Column('id', Integer,
                       primary_key=True,
                       test_needs_autoincrement=True), Column('data',
                       String(30)))
        table2 = Table('table2', metadata, Column('id', Integer,
                       primary_key=True,
                       test_needs_autoincrement=True), Column('data',
                       String(30)), Column('t1id', Integer,
                       ForeignKey('table1.id')))

        class Foo(object):
            pass

        class Bar(object):
            pass

        mapper(Foo, table1, properties={'bars'
               : relationship(mapper(Bar, table2))})
        metadata.create_all()
        session = sessionmaker()

        @profile_memory()
        def go():
            s = table2.select()
            sess = session()
            sess.query(Foo).join((s, Foo.bars)).all()
            sess.rollback()
        try:
            go()
        finally:
            metadata.drop_all()



    def test_type_compile(self):
        from sqlalchemy.dialects.sqlite.base import dialect as SQLiteDialect
        cast = sa.cast(column('x'), sa.Integer)
        @profile_memory()
        def go():
            dialect = SQLiteDialect()
            cast.compile(dialect=dialect)
        go()

    @testing.requires.cextensions
    def test_DecimalResultProcessor_init(self):
        @profile_memory()
        def go():
            to_decimal_processor_factory({}, 10)
        go()

    @testing.requires.cextensions
    def test_DecimalResultProcessor_process(self):
        @profile_memory()
        def go():
            to_decimal_processor_factory(decimal.Decimal, 10)(1.2)
        go()

    @testing.requires.cextensions
    def test_UnicodeResultProcessor_init(self):
        @profile_memory()
        def go():
            to_unicode_processor_factory('utf8')
        go()