postgres hook 测试成功

scripts/do_pgbecnh.md

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+```shell
+# 1. 安装 PostgreSQL 和 pgbench
+
+sudo apt-get update
+sudo apt-get install -y postgresql postgresql-contrib
+
+# 2. 找到 postgresql.conf（Ubuntu 通常在这个目录）
+
+ls /etc/postgresql/*/main/postgresql.conf
+
+# 3. 配置禁用 mmap（编辑 postgresql.conf）
+
+shared_memory_type = sysv
+dynamic_shared_memory_type = sysv
+
+# 4. 重启 PostgreSQL
+
+sudo systemctl stop postgresql
+rm -rf /home/lian/pg/pgdata
+rm -rf /zvfs/pg_ts_bench
+
+sudo chown -R postgres:postgres /home/lian/pg
+sudo -u postgres mkdir -p /home/lian/pg/pgdata
+sudo chown -R postgres:postgres /home/lian/pg/pgdata
+
+sudo -u postgres env LD_PRELOAD=/home/lian/try/zvfs/src/libzvfs.so \
+    /usr/lib/postgresql/12/bin/initdb -D /home/lian/pg/pgdata
+
+cp  ./postgresql.conf /home/lian/pg/pgdata/
+
+sudo -u postgres env LD_PRELOAD=/home/lian/try/zvfs/src/libzvfs.so \
+    /usr/lib/postgresql/12/bin/pg_ctl -D /home/lian/pg/pgdata -l /tmp/pg.log start
+
+sudo -u postgres env LD_PRELOAD=/home/lian/try/zvfs/src/libzvfs.so \
+    /usr/lib/postgresql/12/bin/psql 
+
+sudo -u postgres env LD_PRELOAD=/home/lian/try/zvfs/src/libzvfs.so \
+    /usr/lib/postgresql/12/bin/pg_ctl -D /home/lian/pg/pgdata -l /tmp/pg.log restart
+
+# 创建测试环境
+sudo -u postgres mkdir -p /zvfs/pg_ts_bench
+sudo chown -R postgres:postgres /zvfs/pg_ts_bench
+sudo chmod 700 /zvfs/pg_ts_bench
+
+CREATE TABLESPACE zvfs_ts LOCATION '/zvfs/pg_ts_bench';
+DROP DATABASE IF EXISTS benchdb;
+CREATE DATABASE benchdb TABLESPACE zvfs_ts;
+
+DROP TABLE IF EXISTS hook_probe;
+CREATE TABLE hook_probe(id int) TABLESPACE zvfs_ts;
+INSERT INTO hook_probe VALUES (1);
+INSERT INTO hook_probe VALUES (2);
+INSERT INTO hook_probe VALUES (3);
+INSERT INTO hook_probe VALUES (4);
+SELECT * FROM hook_probe;
+DELETE FROM hook_probe WHERE id = 1;
+UPDATE hook_probe SET id = 11 WHERE id = 2;
+SELECT * FROM hook_probe;
+
+
+# 5. 验证配置生效
+pid=$(pgrep -u postgres -xo postgres) 
+echo "pid=$pid"
+sudo grep libzvfs /proc/$pid/maps
+
+sudo -u postgres psql -p 5432 -c "show data_directory;"
+sudo -u postgres psql -c "SHOW shared_memory_type;"
+sudo -u postgres psql -c "SHOW dynamic_shared_memory_type;"
+
+# 6. 创建测试库（如未创建）
+
+sudo -u postgres createdb benchdb
+
+# 7. 运行你的 bench 脚本
+
+bash /home/lian/try/zvfs/scripts/run_pgbench_no_mmap.sh
+```