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80 lines
2.3 KiB
SQL
80 lines
2.3 KiB
SQL
-- 测试前记录基准数据
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-- 用法：psql -d xingrin -f pg_stats_before_test.sql > stats_before.txt
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\echo '========================================'
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\echo ' PostgreSQL 测试前基准数据'
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\echo '========================================'
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\echo ''
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\echo '当前时间:'
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SELECT now();
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\echo ''
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\echo '数据库连接配置:'
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SHOW max_connections;
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SHOW shared_buffers;
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SHOW work_mem;
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SHOW maintenance_work_mem;
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\echo ''
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\echo '表记录数（测试前）:'
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SELECT
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schemaname || '.' || relname as table_name,
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n_live_tup as row_count,
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pg_size_pretty(pg_total_relation_size(schemaname||'.'||relname)) as total_size
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FROM pg_stat_user_tables
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WHERE schemaname = 'public'
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AND relname IN ('subdomain', 'ip_address', 'port', 'website', 'endpoint', 'directory', 'scan')
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ORDER BY n_live_tup DESC;
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\echo ''
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\echo '索引信息:'
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SELECT
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schemaname || '.' || tablename as table_name,
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indexname,
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pg_size_pretty(pg_relation_size(indexname::regclass)) as index_size
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FROM pg_indexes
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WHERE schemaname = 'public'
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AND tablename IN ('subdomain', 'ip_address', 'port', 'website', 'endpoint', 'directory')
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ORDER BY tablename, indexname;
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\echo ''
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\echo '当前活跃连接数:'
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SELECT
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count(*) as total,
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count(*) FILTER (WHERE state = 'active') as active,
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count(*) FILTER (WHERE state = 'idle') as idle
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FROM pg_stat_activity
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WHERE datname = current_database();
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\echo ''
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\echo '表统计信息（累计）:'
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SELECT
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schemaname || '.' || relname as table_name,
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seq_scan as sequential_scans,
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seq_tup_read as seq_rows_read,
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idx_scan as index_scans,
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idx_tup_fetch as idx_rows_fetched,
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n_tup_ins as inserts,
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n_tup_upd as updates,
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n_tup_del as deletes
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FROM pg_stat_user_tables
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WHERE schemaname = 'public'
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AND relname IN ('subdomain', 'ip_address', 'port', 'website', 'endpoint', 'directory')
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ORDER BY relname;
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\echo ''
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\echo '缓存命中率:'
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SELECT
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sum(heap_blks_hit) as heap_blocks_hit,
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sum(heap_blks_read) as heap_blocks_read,
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CASE
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WHEN sum(heap_blks_hit) + sum(heap_blks_read) = 0 THEN 0
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ELSE round((sum(heap_blks_hit)::numeric / (sum(heap_blks_hit) + sum(heap_blks_read))) * 100, 2)
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END as cache_hit_ratio_percent
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FROM pg_statio_user_tables
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WHERE schemaname = 'public';
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\echo ''
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\echo '========================================'
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