获得MySQL/PostgreSQL在GNU/Linux和FreeBSD下的内存占用比例：

PostgreSQL从8.3.x升级到8.4.0后，pgpool-II的最新版2.2.2无法编译通过，报以下错误： sed ‘s,MODULE_PATHNAME,$libdir/pgpool-recovery,g’ pgpool-recovery.sql.in >pgpool-recovery.sql cc -O2 -fno-strict-aliasing -pipe -O3 -funroll-loops -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -fno-strict-aliasing -fwrapv -fPIC -DPIC -I. -I/usr/local/include/postgresql/server -I/usr/local/include/postgresql/internal -I/usr/local/include -c -o pgpool-recovery.o pgpool-recovery.c pgpool-recovery.c: In function `pgpool_recovery’: pgpool-recovery.c:47: error: `textout’ undeclared (first use in this function) pgpool-recovery.c:47: error: (Each undeclared identifier is reported only once pgpool-recovery.c:47: error: for each function […]