mirror of
https://github.com/FirebirdSQL/firebird-qa.git
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109 lines
3.9 KiB
Python
109 lines
3.9 KiB
Python
#coding:utf-8
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"""
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ID: issue-6706
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ISSUE: https://github.com/FirebirdSQL/firebird/issues/6706
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TITLE: Memory leak when running EXECUTE STATEMENT with named parameters [CORE6475]
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DESCRIPTION:
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We create stored procedure with PARAMS_COUNT input parameters.
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Then EXECUTE BLOCK is generated with call of this SP via EXECUTE STATEMENT which applies EXCESS modifier to all arguments.
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Value of memory_info().rss is obtained (for appropriate server process), then run execute block MEASURES_COUNT times
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and after this - again get memory_info().rss value.
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Ratio between current and initial values of memory_info().rss must be less than MAX_RATIO.
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NOTES:
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[17.08.2024] pzotov
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1. Problem did exist in FB 4.x up to snapshot 4.0.0.2336.
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Commit: https://github.com/FirebirdSQL/firebird/commit/4dfb30a45b767994c074bbfcbb8494b8ada19b33 (23-jan-2021, 15:26)
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Before this commit ratio for SS was about 5..6 for SS and about 8..9 for CS.
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Since 4.0.0.2341 memory consumption was reduced to ~1.6 ... 1.9
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2. Database must be created with FW = ON otherwise ratio for all snapshots is about 1.5 (and this seems weird).
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3. Test duration is about 35s.
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Checked on 6.0.0.438, 5.0.2.1478, 4.0.6.3142; 4.0.0.2336, 4.0.0.2341.
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"""
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import psutil
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import pytest
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from firebird.qa import *
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import time
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###########################
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### S E T T I N G S ###
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###########################
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# How many input parameters must have procedure:
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PARAMS_COUNT = 1000
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# How many times we call procedures:
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MEASURES_COUNT = 1000
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# Maximal value for ratio between
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# new and initial memory_info().rss values:
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#
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MAX_RATIO = 3
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#############
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db = db_factory(async_write = False)
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act = python_act('db')
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#--------------------------------------------------------------------
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def get_server_pid(con):
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with con.cursor() as cur:
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cur.execute('select mon$server_pid as p from mon$attachments where mon$attachment_id = current_connection')
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fb_pid = int(cur.fetchone()[0])
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return fb_pid
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#--------------------------------------------------------------------
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@pytest.mark.version('>=4.0.0')
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def test_1(act: Action, capsys):
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with act.db.connect() as con:
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sp_ddl = """
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create or alter procedure sp_test(
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"""
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params_lst = '\n'.join( [ (',' if i else '') +f'p_{i} int' for i in range(PARAMS_COUNT) ] )
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sp_ddl = '\n'.join( ("create or alter procedure sp_test(", params_lst, ") returns(x int) as begin x = 1; suspend; end") )
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con.execute_immediate(sp_ddl)
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con.commit()
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server_process = psutil.Process(get_server_pid(con))
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params_lst = ','.join( [ f':p_{i}' for i in range(PARAMS_COUNT) ] )
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passed_args = ','.join( [ f'excess p_{i} := 1' for i in range(PARAMS_COUNT) ] )
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srv_memo_rss_init = int(server_process.memory_info().rss / 1024)
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srv_memo_vms_init = int(server_process.memory_info().vms / 1024)
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cur = con.cursor()
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for k in range(MEASURES_COUNT):
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es_sql = f"""
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execute block returns(x int) as
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begin
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execute statement ('select p.x * {k} from sp_test({params_lst}) p') ({passed_args})
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into x;
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suspend;
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end
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"""
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cur.execute(es_sql)
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for r in cur:
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pass
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srv_memo_rss_curr = int(server_process.memory_info().rss / 1024)
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srv_memo_vms_curr = int(server_process.memory_info().vms / 1024)
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memo_ratio = srv_memo_rss_curr / srv_memo_rss_init
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SUCCESS_MSG = 'Ratio between memory values measured before and after loop: acceptable'
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if memo_ratio < MAX_RATIO:
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print(SUCCESS_MSG)
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else:
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print( 'Ratio: /* perf_issue_tag */ POOR: %s, more than threshold: %s' % ( '{:.2f}'.format(memo_ratio), '{:.2f}'.format(MAX_RATIO) ) )
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act.expected_stdout = SUCCESS_MSG
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act.stdout = capsys.readouterr().out
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assert act.clean_stdout == act.clean_expected_stdout
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