从 PostgreSQL 13 开始，`dynamic_shared_memory_type` 参数不再支持 `sysv` 选项。这个改动是为了简化...
一、简介 linux为多个进程通信提供了不同的IPC机制,如:System V , POSIX 和 MMAP,所以Postgresql共享内存管理也支持以上类型。 在Postgresql中可以使用dynamic_shared_memory_type参数指定共享内存类型。 默认使用posix,修改参数后需要重启数据库。 dynamic_shared_memory_type = posix # the default is the first opti...
if (dynamic_shared_memory_type == DSM_IMPL_MMAP) /* If we're using the mmap implementations, clean up any leftovers. Cleanup isn't needed on Windows, and happens earlier in startup for POSIX and System V shared memory, via a direct call to dsm_cleanup_using_control_segment. */ dsm_...
server starting[postgres@drz ~]$LOG:unrecognized configuration parameter "dynamic_shared_memory_type"infile"/opt/postgresql/data/postgresql.conf" line127FATAL: configurationfile"/opt/postgresql/data/postgresql.conf"containserrors 解决方式: #给启动命令加上绝对路径,问题得到解决[postgres@drz ~]$/opt/postgr...
文档dynamic_shared_memory_type hash_mem_multiplier 展开表 属性值 类别资源使用情况/内存 说明要用于哈希表的多个 work_mem。 数据类型numeric 默认值2 允许的值1-1000 参数类型动态 文档hash_mem_multiplier huge_pages 展开表 Attribute值 类别资源使用情况/内存 ...
autovacuum_work_mem 在数据库中最重要的autovacuum中使用的内存,默认值 -1表示为使用 maintenance_work_mem的配置来替代这个配置. shared_memory_type = mmap dynamic_shared_memory_type = posix (上面两个值可以查看官方文档) https://www.postgresql.org/docs/12/runtime-config-resource.html PAGE 314...
dynamic_shared_memory_type = mmap # the default is the first option vacuum_cost_delay = 0 # 0-100 milliseconds , 垃圾回收不妥协,极限压力下,减少膨胀可能性 bgwriter_delay = 10ms # 10-10000ms between rounds , 刷shared buffer脏页的进程调度间隔,尽量高频调度,减少用户进程申请不到内存而需要主动刷...
dynamic_shared_memory_type = posix # the default is usually the first option wal_level = replica # minimal, replica, or logical full_page_writes = on # recover from partial page writes wal_log_hints = on # also do full page writes of non-critical updates ...
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 fsync = on synchronous_commit = on full_page_writes = on ...
第一步:申请共享内存setup_dynamic_shared_memory 代码语言:javascript 代码运行次数:0 运行 AI代码解释 staticvoidsetup_dynamic_shared_memory(int64 queue_size,int nworkers,dsm_segment**segp,test_shm_mq_header**hdrp,shm_mq**outp,shm_mq**inp){shm_toc_estimator e;int i;Size segsize;dsm_segment*...