Hi , Thanks for the inputs and direction.With the help of the support table i narrowed down to windows 2008 and 2003 servers.32 bit postgres 9.2.4 was very slow on windows 2008 (64 bit ), on running postgres 9.2.4 64 bit the response time was similar to what i used to get on windows 7. I did not have to do any performance tuning , the defaults worked.This works good for me.With this i was able to resolve postgres issues. ThanksGirish Subbaramu
From: pella.s...@gmail.com Date: Thu, 22 Aug 2013 17:25:51 +0200 Subject: Re: [PERFORM] PostgreSQL 9.2.4 very slow on laptop with windows 8 To: gsubbar...@hotmail.com CC: pgsql-performance@postgresql.org As I see only Windows7 supported ( with EnterpriseDB version of PostgreSQL 9.2 Windows installer )http://www.enterprisedb.com/products-services-training/products-overview/postgresql-overview/supported-platforms-and-release-lif Have you been tested with PostgreSQL 9.3 rc1 ? same speed ?http://www.enterprisedb.com/products-services-training/pgdevdownload and some testing tips: - modify laptop power settings - compare disk speeds (laptop vs. desktop ) - ... Imre 2013/8/22 girish subbaramu <gsubbar...@hotmail.com> Hi, I am running PostgreSQL 9.2.4 on windows 8 , 64 bit operating system , 4GB RAM. A laptop with i3 - 3110M , 2.4 GHZ . The database came bundled with wapp stack 5.4.17-0. We have an php application that serves data from PostgreSQL 9.2.4. The configuration runs with very good performance (3 sec response php + db ) on windows 7 32, 64 bit OS , 4GB RAM (desktops with i3-2100 3.10 GHZ ) . But take around 25 seconds to render on windows 8 , the laptop. I was able to eliminate php , as the performance was as expected. (without DB calls)On the other part the database calls take more than 100 ms for simple queries (Example a table with just 10 row sometimes takes around 126 ms). This information i was able to collect from the pg_log. The php pages have multiple queries in them, a single query works as expected, but running multiple queries in the page causes the db performance to go down. Please note this setup is working fine (3 sec overall including php ) on all windows 7 32, 64 bit OS , desktops. Appreciate help in giving me an direction on how to get to the issue.The db size is 11mb only. Most of the tables have less than 100 rows with appropriate indexes. Some tables have more than 1000 rows , are not queried in the php pages . The super user login is used from php . (Changing super user reserved connections did not help, tried changing shared _buffers and other setting , none of the setting seem to have any effect on the db performance ) Following are the variable settings that works fine on on all windows 7 32, 64 bit OS , desktops. Name Settingallow_system_table_modsoffapplication_name archive_command(disabled)archive_modeoff archive_timeout0array_nullson authentication_timeout1minautovacuumonautovacuum_analyze_scale_factor 0.1autovacuum_analyze_threshold50autovacuum_freeze_max_age 200000000autovacuum_max_workers3autovacuum_naptime 1minautovacuum_vacuum_cost_delay20msautovacuum_vacuum_cost_limit -1autovacuum_vacuum_scale_factor0.2autovacuum_vacuum_threshold 50backslash_quotesafe_encodingbgwriter_delay 200msbgwriter_lru_maxpages100bgwriter_lru_multiplier 2block_size8192bonjouroff bonjour_namebytea_outputescapecheck_function_bodies oncheckpoint_completion_target0.5checkpoint_segments 3checkpoint_timeout5mincheckpoint_warning30s client_encodingUTF8client_min_messagesnotice commit_delay0commit_siblings5 config_fileC:/xxxx~2/POSTGR~1/data/postgresql.confconstraint_exclusionpartition cpu_index_tuple_cost0.005cpu_operator_cost0.0025 cpu_tuple_cost0.01cursor_tuple_fraction0.1 data_directory C:/xxx~2/POSTGR~1/dataDateStyleISO, MDYdb_user_namespace offdeadlock_timeout1sdebug_assertionsoff debug_pretty_printondebug_print_parseoff debug_print_planoffdebug_print_rewrittenoff default_statistics_target100default_tablespace default_text_search_config pg_catalog.englishdefault_transaction_deferrableoff default_transaction_isolation read committeddefault_transaction_read_onlyoffdefault_with_oids offdynamic_library_path$libdireffective_cache_size 128MBeffective_io_concurrency0enable_bitmapscan onenable_hashaggonenable_hashjoinon enable_indexonlyscanonenable_indexscanon enable_materialonenable_mergejoinonenable_nestloop onenable_seqscanonenable_sorton enable_tidscanonescape_string_warningonevent_source PostgreSQLexit_on_erroroffexternal_pid_file extra_float_digits0from_collapse_limit8 fsynconfull_page_writeson geqoongeqo_effort5geqo_generations 0geqo_pool_size0geqo_seed0 geqo_selection_bias2geqo_threshold12gin_fuzzy_search_limit 0hba_fileC:/xxxx~2/POSTGR~1/data/pg_hba.confhot_standby offhot_standby_feedbackoffident_fileC:/xxxx~2/POSTGR~1/data/pg_ident.conf ignore_system_indexesoffinteger_datetimeson IntervalStylepostgresjoin_collapse_limit8 krb_caseins_usersoffkrb_server_keyfilekrb_srvname postgreslc_collateEnglish_United States.1252lc_ctype English_United States.1252lc_messagesEnglish_United States.1252 lc_monetaryEnglish_United States.1252lc_numericEnglish_United States.1252 lc_timeEnglish_United States.1252listen_addresses127.0.0.1 lo_compat_privilegesofflocal_preload_libraries log_autovacuum_min_duration-1log_checkpointsoff log_connectionsofflog_destinationstderrlog_directory pg_loglog_disconnectionsofflog_durationoff log_error_verbositydefaultlog_executor_statsoff log_file_mode0600log_filenamepostgresql-%Y-%m-%d_%H%M%S.log log_hostnameofflog_line_prefix log_lock_waitsofflog_min_duration_statement-1 log_min_error_statementerrorlog_min_messageswarning log_parser_statsofflog_planner_statsofflog_rotation_age 1dlog_rotation_size10MBlog_statementnone log_statement_statsofflog_temp_files-1 log_timezoneAsia/Calcuttalog_truncate_on_rotationoff logging_collectoronmaintenance_work_mem16MB max_connections100max_files_per_process1000max_function_args 100max_identifier_length63max_index_keys32 max_locks_per_transaction64max_pred_locks_per_transaction 64max_prepared_transactions0max_stack_depth 2MBmax_standby_archive_delay30smax_standby_streaming_delay 30smax_wal_senders0password_encryptionon port5432post_auth_delay0 pre_auth_delay0quote_all_identifiersoffrandom_page_cost 4replication_timeout1minrestart_after_crash onsearch_path"$user",viplsegment_size 1GBseq_page_cost1server_encodingUTF8 server_version9.2.4server_version_num90204 session_replication_role originshared_buffers1GBshared_preload_libraries sql_inheritanceonssloff ssl_ca_filessl_cert_fileserver.crtssl_ciphers ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTHssl_crl_filessl_key_file server.keyssl_renegotiation_limit512MBstandard_conforming_strings onstatement_timeout0stats_temp_directorypg_stat_tmp superuser_reserved_connections3synchronize_seqscans on synchronous_commitonsynchronous_standby_names syslog_facilitynonesyslog_identpostgres tcp_keepalives_count0tcp_keepalives_idle-1 tcp_keepalives_interval -1temp_buffers16MBtemp_file_limit-1 temp_tablespacesTimeZoneAsia/Calcutta timezone_abbreviationsDefaulttrace_notifyoff trace_recovery_messageslogtrace_sortofftrack_activities ontrack_activity_query_size1024track_counts ontrack_functionsnonetrack_io_timingoff transaction_deferrableofftransaction_isolationread committed transaction_read_onlyofftransform_null_equalsoff unix_socket_directoryunix_socket_group unix_socket_permissions0777update_process_titleon vacuum_cost_delay0vacuum_cost_limit200vacuum_cost_page_dirty 20vacuum_cost_page_hit1vacuum_cost_page_miss 10vacuum_defer_cleanup_age0vacuum_freeze_min_age 50000000vacuum_freeze_table_age150000000wal_block_size 8192wal_buffers16MBwal_keep_segments0 wal_levelminimalwal_receiver_status_interval10s wal_segment_size16MBwal_sync_methodopen_datasync wal_writer_delay200mswork_mem512MB xmlbinarybase64xmloptioncontentzero_damaged_pages off ThanksGirish Subbaramu.
