elog(vfdP->fdstate & FD_TEMP_FILE_LIMIT ? LOG : data_sync_elevel(LOG), "could not close file \"%s\": %m", vfdP->fileName); vfdP->fd = VFD_CLOSED; --nfile; /* delete the vfd record from the LRU ring */ Delete(file); } LruInsert:加入到环首 static void Insert(File fil...
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#define GUC_NOT_IN_SAMPLE 0x0020 /* not in postgresql.conf.sample */ #define GUC_DISALLOW_IN_FILE 0x0040 /* can't set in postgresql.conf */ #define GUC_CUSTOM_PLACEHOLDER 0x0080 /* placeholder for custom variable */ #define GUC_SUPERUSER_ONLY 0x0100 /* show only to superusers */...
less than your OS' limit on file size. This is often 2 GB or 4GB in a 32-bit operating system, unless you have large file support enabled. By default, we make the limit 1 GB to avoid any possible integer-overflow problems within the OS. A limit smaller than necessary only means we ...
pg_settings_temp_buffers_bytes:设置临时缓冲区字节[lw] pg_settings_temp_file_limit_bytes:设置临时文件限制字节[lw] pg_settings_trace_notify:设置跟踪通知[lw] pg_settings_trace_sort:设置跟踪排序[lw] pg_settings_track_activities:设置跟踪活动[lw] pg_settings_track_activity_query_size:设置跟踪活动查询...
the maximum size of a single file is RELSEG_SIZE * BLCKSZ; relations bigger than that are divided into multiple files. RELSEG_SIZE * BLCKSZ must be less than your OS' limit on file size. This is often 2 GB or 4GB in a 32-bit operating system, unless you have large file support ...
autovacuum, in milliseconds;# -1 means use vacuum_cost_delay#autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for# autovacuum, -1 means use# vacuum_cost_limit 内存结构 本地内存、共享内存。 几个参数: #work_mem = 4MB#maintenance_work_mem = 64MB#temp_buffers = 8MBshared_...
32-bit operating system, unless you have large file support enabled. By default, we make the limit 1 GB to avoid any possible integer-overflow problems within the OS. A limit smaller than necessary only means we divide a large relation into more chunks than necessary, so it seems best to...
Removed an implicit limit on the number of files opened simultaneously in each server subprocess. Added the ability to disable checksums in the cluster. By default, checksums are enabled when Postgres Pro is installed. The installation procedure depends on the version of your current installation...
id = temp_ids.id; 5. 使用 ANY 或ARRAY 在某些情况下,使用 ANY 或ARRAY 可能会提高查询性能: 代码语言:javascript 复制 SELECT * FROM your_table WHERE id = ANY(ARRAY[1, 2, 3, ...]); 6. 分析和优化表 确保表和索引是最新的,并且统计信息是准确的。你可以使用 ANALYZE 命令来更新统计信息: ...