将RAISE NOTICE 'xact_id: %', pg_current_xact_id_if_assigned ();放在代码中感兴趣的区域可以给...
# logical replication and will not work otherwise max_wal_senders = 10 # at least the number of nodes wal_sender_timeout = 0 default_transaction_isolation = 'repeatable read' max_replication_slots = 10 # at least the number of nodes shared_preload_libraries = '/opt/pgsql/mmts/lib/rafta...
2,shared_buffers 25% of total memory 数据库用于缓存数据的内存大小。该参数默认值很低(考虑不同的系统平台),需要调整。不宜太大,很多实践表明,大于1/3的内存会降低性能。 3,effective_cache_size 50%-75% of total memory This is a guideline for how much memory you expect to be available in the ...
tcp_keepalives_count = 0 shared_buffers = 32GB huge_pages = on maintenance_work_mem = 1GB dynamic_shared_memory_type = posix vacuum_cost_delay = 0 bgwriter_delay = 10ms bgwriter_lru_maxpages = 500 effective_io_concurrency = 0 max_parallel_workers_per_gather = 0 wal_level = minimal fs...
enable_shared_relcache = on relcache_query_target = primary memory_cache_enabled = off memqcache_method = 'shmem' memqcache_memcached_host = 'localhost' memqcache_memcached_port = 11211 memqcache_total_size = 64MB memqcache_max_num_cache = 1000000 ...
enable_shared_relcache = on relcache_query_target = primary memory_cache_enabled = off memqcache_method = 'shmem' memqcache_memcached_host = 'localhost' memqcache_memcached_port = 11211 memqcache_total_size = 64MB memqcache_max_num_cache = 1000000 ...
perf report -vg --stdio# Events: 17 skb:kfree_skb## Overhead Command Shared Object Symbol# ... ... ... ...#35.29% init [kernel.kallsyms] 0xffffffff8103c94b k [k] native_safe_halt | --- native_safe_halt 11.76% syslog-ng /lib64/libpthread-2.12.so 0xea10 B [.] __recvmsg...
LOCK改进,Partition the shared hash table freelist to reduce contention on multi-CPU-socket servers (Aleksander Alekseev) 本文将针对高并发的读,写,更新场景测试一下9.6和9.5的性能差异。 为了规避IO瓶颈的影响,体现9.6代码处理逻辑方面的改进,所有测试场景的数据均小于内存大小。
shared_buffers = 256GB# min 128kBhuge_pages = on# on, off, or trywork_mem = 512MB# min 64kBmaintenance_work_mem = 1GB# min 1MBautovacuum_work_mem = 1GB# min 1MB, or -1 to use maintenance_work_memdynamic_shared_memory_type = posix# the default is the first optionbgwriter_delay ...
place_tag_processor places; geometry_builder builder; std::shared_ptr<reprojection> reproj; // string formatters // Need to be part of the class, so we have one per thread. boost::format single_fmt; boost::format point_fmt; }; extern output_gazetteer_t out_gazetteer; #endifFooter...