Add:
Add:

> * Maintain a map of recently-expired of pages so vacuum can reclaim
>   free space without a sequential scan

xuegang/gpdb,CraigHarris/gpdb,snaga/postgres-xl,Quikling/gpdb,royc1/gpdb,pavanvd/postgres-xl,xuegang/gpdb,chrishajas/gpdb,zaksoup/gpdb,greenplum-db/gpdb,50wu/gpdb,foyzur/gpdb,edespino/gpdb,janebeckman/gpdb,lintzc/gpdb,rvs/gpdb,lintzc/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,kmjungersen/PostgresXL,50wu/gpdb,lintzc/gpdb,jmcatamney/gpdb,Postgres-XL/Postgres-XL,lisakowen/gpdb,snaga/postgres-xl,edespino/gpdb,edespino/gpdb,rubikloud/gpdb,jmcatamney/gpdb,rvs/gpdb,rubikloud/gpdb,cjcjameson/gpdb,ovr/postgres-xl,Quikling/gpdb,jmcatamney/gpdb,Chibin/gpdb,foyzur/gpdb,atris/gpdb,yuanzhao/gpdb,yazun/postgres-xl,royc1/gpdb,chrishajas/gpdb,Chibin/gpdb,tpostgres-projects/tPostgres,0x0FFF/gpdb,CraigHarris/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,lisakowen/gpdb,rvs/gpdb,kaknikhil/gpdb,snaga/postgres-xl,kaknikhil/gpdb,edespino/gpdb,randomtask1155/gpdb,xuegang/gpdb,greenplum-db/gpdb,pavanvd/postgres-xl,kaknikhil/gpdb,zaksoup/gpdb,chrishajas/gpdb,CraigHarris/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,yuanzhao/gpdb,lisakowen/gpdb,atris/gpdb,0x0FFF/gpdb,lintzc/gpdb,arcivanov/postgres-xl,royc1/gpdb,xinzweb/gpdb,royc1/gpdb,arcivanov/postgres-xl,royc1/gpdb,rvs/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,yazun/postgres-xl,chrishajas/gpdb,CraigHarris/gpdb,foyzur/gpdb,adam8157/gpdb,yazun/postgres-xl,rubikloud/gpdb,techdragon/Postgres-XL,Chibin/gpdb,arcivanov/postgres-xl,yuanzhao/gpdb,rvs/gpdb,Chibin/gpdb,50wu/gpdb,Chibin/gpdb,oberstet/postgres-xl,adam8157/gpdb,janebeckman/gpdb,rubikloud/gpdb,xinzweb/gpdb,tangp3/gpdb,0x0FFF/gpdb,pavanvd/postgres-xl,greenplum-db/gpdb,cjcjameson/gpdb,50wu/gpdb,jmcatamney/gpdb,rubikloud/gpdb,foyzur/gpdb,ahachete/gpdb,rvs/gpdb,foyzur/gpdb,kmjungersen/PostgresXL,cjcjameson/gpdb,zaksoup/gpdb,jmcatamney/gpdb,postmind-net/postgres-xl,techdragon/Postgres-XL,zaksoup/gpdb,CraigHarris/gpdb,atris/gpdb,Chibin/gpdb,atris/gpdb,50wu/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,ahachete/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,xuegang/gpdb,rvs/gpdb,chrishajas/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,randomtask1155/gpdb,rubikloud/gpdb,lintzc/gpdb,xuegang/gpdb,xuegang/gpdb,Quikling/gpdb,tangp3/gpdb,oberstet/postgres-xl,xuegang/gpdb,chrishajas/gpdb,snaga/postgres-xl,ashwinstar/gpdb,zaksoup/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,adam8157/gpdb,jmcatamney/gpdb,Postgres-XL/Postgres-XL,janebeckman/gpdb,lpetrov-pivotal/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,janebeckman/gpdb,0x0FFF/gpdb,lintzc/gpdb,Chibin/gpdb,randomtask1155/gpdb,janebeckman/gpdb,rvs/gpdb,50wu/gpdb,yuanzhao/gpdb,kmjungersen/PostgresXL,postmind-net/postgres-xl,edespino/gpdb,snaga/postgres-xl,jmcatamney/gpdb,tangp3/gpdb,zaksoup/gpdb,cjcjameson/gpdb,arcivanov/postgres-xl,xinzweb/gpdb,xuegang/gpdb,zeroae/postgres-xl,janebeckman/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,zeroae/postgres-xl,lintzc/gpdb,50wu/gpdb,royc1/gpdb,zeroae/postgres-xl,tpostgres-projects/tPostgres,rubikloud/gpdb,Postgres-XL/Postgres-XL,tangp3/gpdb,adam8157/gpdb,greenplum-db/gpdb,lisakowen/gpdb,postmind-net/postgres-xl,Quikling/gpdb,kaknikhil/gpdb,tpostgres-projects/tPostgres,ahachete/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,arcivanov/postgres-xl,lpetrov-pivotal/gpdb,50wu/gpdb,lpetrov-pivotal/gpdb,Postgres-XL/Postgres-XL,ahachete/gpdb,atris/gpdb,tangp3/gpdb,pavanvd/postgres-xl,0x0FFF/gpdb,CraigHarris/gpdb,Chibin/gpdb,royc1/gpdb,randomtask1155/gpdb,foyzur/gpdb,adam8157/gpdb,tangp3/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,royc1/gpdb,atris/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,edespino/gpdb,0x0FFF/gpdb,ovr/postgres-xl,CraigHarris/gpdb,yuanzhao/gpdb,foyzur/gpdb,0x0FFF/gpdb,zeroae/postgres-xl,kaknikhil/gpdb,zaksoup/gpdb,greenplum-db/gpdb,edespino/gpdb,kaknikhil/gpdb,ahachete/gpdb,zaksoup/gpdb,randomtask1155/gpdb,lpetrov-pivotal/gpdb,ahachete/gpdb,edespino/gpdb,rubikloud/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,rvs/gpdb,Quikling/gpdb,Quikling/gpdb,lisakowen/gpdb,janebeckman/gpdb,xuegang/gpdb,oberstet/postgres-xl,ashwinstar/gpdb,tangp3/gpdb,adam8157/gpdb,yazun/postgres-xl,ahachete/gpdb,edespino/gpdb,Chibin/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,janebeckman/gpdb,xinzweb/gpdb,ovr/postgres-xl,tangp3/gpdb,xinzweb/gpdb,zeroae/postgres-xl,lpetrov-pivotal/gpdb,ovr/postgres-xl,yazun/postgres-xl,Quikling/gpdb,foyzur/gpdb,randomtask1155/gpdb,cjcjameson/gpdb,lintzc/gpdb,postmind-net/postgres-xl,kaknikhil/gpdb,greenplum-db/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,adam8157/gpdb,tpostgres-projects/tPostgres,atris/gpdb,edespino/gpdb,Quikling/gpdb,atris/gpdb,chrishajas/gpdb,Chibin/gpdb,Quikling/gpdb,lisakowen/gpdb,lintzc/gpdb,xinzweb/gpdb,techdragon/Postgres-XL,randomtask1155/gpdb,cjcjameson/gpdb,chrishajas/gpdb,Quikling/gpdb,ashwinstar/gpdb,oberstet/postgres-xl,ahachete/gpdb,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,randomtask1155/gpdb,ashwinstar/gpdb,ovr/postgres-xl,tpostgres-projects/tPostgres,yuanzhao/gpdb,janebeckman/gpdb