如果需要处理更深的递归,可以通过设置max_stack_depth参数来增加递归深度。 内存使用:递归查询可能会消耗大量内存,尤其是在处理大量数据时。可以通过调整work_mem参数来增加每个排序操作和哈希表操作可以使用的内存量。 避免无限递归:确保递归查询有明确的终止条件,以避免无限递归导致服务器崩溃。 4. 优化建议 限制递归...
maintenance_work_mem:指定在进行维护性操作(比如create index,vacuum等)时所使用的最大内存量。 max_stack_depth:用来指定服务器执行堆栈的最大安全深度,默认为2M,如果发现不能运行复杂的函数,可以适当地提高此参数的值。 关于WAL日志一些参数: wal_level:指定生成wal日志的级别,值为minmal,archive,hot_standby。 m...
#max_stack_depth=2MB # min 100kB dynamic_shared_memory_type= posix # thedefaultisthe first option # supported by the operating system: # posix # sysv # windows # mmap # use none to disable dynamic shared memory #- Disk -#temp_file_limit= -1# limits per-session temp file space #in...
work_mem = 64MB # min 64kB max_stack_depth = 4MB # min 100kB dynamic_shared_memory_type = posix # the default is the first option #--- # WRITE-AHEAD LOG #--- wal_level = replica # minimal, replica, or logical fsync = on # flush...
max_stack_depth (integer) 声明服务器的执行堆栈的最大安全深度。为此设置一个参数的原因是内核强制的实际堆栈尺寸(就是 ulimit -s 或者局部等效物的设置),小于一个安全的一兆字节左右的范围。 需要这么一个安全的界限是因为在服务器里,并非所有过程都检查了堆栈深度, 儿只是在可能递规的过程,比如表达式计算这样的...
[kernel.kallsyms] 1758.00 0.4% check_stack_depth /u02/digoal/soft_bak/pgsql9.5/bin/postgres 1749.00 0.3% _bt_binsrch /u02/digoal/soft_bak/pgsql9.5/bin/postgres 1748.00 0.3% ReadBuffer_common /u02/digoal/soft_bak/pgsql9.5/bin/postgres 1747.00 0.3% expression_tree_walker/u02/digoal/soft...
max_connections = 2000 unix_socket_directory = '.' unix_socket_permissions = 0700 tcp_keepalives_idle = 60 tcp_keepalives_interval = 10 tcp_keepalives_count = 10 shared_buffers = 2048MB maintenance_work_mem = 512MB max_stack_depth = 8MB shared_preload_libraries = 'pg_stat_statements'...
# vi postgresql.conf listen_addresses='0.0.0.0' port=1921 max_connections=100 unix_socket_directories='.' ssl=on ssl_ciphers='EXPORT40' shared_buffers=512MB huge_pages=try max_prepared_transactions=0 max_stack_depth=100kB dynamic_shared_memory_type=posix max_files_per_process=500 wal_level...
pgsql_perf_tuning.md Breadcrumbs pgsql_admin_script / Latest commit digoal Update pgsql_perf_tuning.md Aug 2, 2016 e592413·Aug 2, 2016 History History File metadata and controls Code Blame 66.6 KB Raw View raw (Sorry about that, but we can’t show files that are this big right now....
#work_mem = 4MB # min 64kB #hash_mem_multiplier = 1.0 # 1-1000.0 multiplier on hash table work_mem #maintenance_work_mem = 64MB # min 1MB #autovacuum_work_mem = -1 # min 1MB, or -1 to use maintenance_work_mem #logical_decoding_work_mem = 64MB # min 64kB #max_stack_depth =...