Tweak trace_sort code to show the merge order (number of active input tapes) for each merge step.  This will give us some idea of how effective the merge distribution algorithm is.
Tweak trace_sort code to show the merge order (number of active input
tapes) for each merge step.  This will give us some idea of how effective
the merge distribution algorithm is.

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