--file = 'filbin.sql'
recreate table t(id int, s01 char(64) character set octets);
commit;
set term ^;
execute block as 
declare n int = 100000;
begin
  while (n>0) do insert into t values(:n-1, gen_uuid()||gen_uuid()||gen_uuid()||gen_uuid() ) returning :n-1 into n;
end^
set term ;^
commit;

-- file = 'filtext.sql'
recreate table t(id int, s01 char(64));
commit;
set term ^;
execute block as 
declare n int = 100000;
begin
  while (n>0) do insert into t values(:n-1, lpad('',64,'a') ) returning :n-1 into n;
end^
set term ;^
commit;

SQL> create database 'tmpuncompressed.fdb' pagesize 8192; commit;
SQL> in filbin.sql;
SQL> create database 'tmpcompressed.fdb' pagesize 8192; commit;
SQL> in filtext.sql;
SQL> quit;

C:\1INSTALL\FIREBIRD\FB25>dir tmp*.fdb
25.01.2012  18:13             6 922 240  TMPCOMPRESSED.FDB
25.01.2012  18:13            14 262 272  TMPUNCOMPRESSED.FDB

C:\1INSTALL\FIREBIRD\FB25>gstat -r TMPCOMPRESSED.FDB
<... skipped ...>
Analyzing database pages ...
T (128)
    Primary pointer page: 148, Index root page: 149
     Average record length: 10.99 , total records: 100000
    Average version length: 0.00, total versions: 0, max versions: 0
    Data pages: 614, data page slots: 614, average fill: 56%
    Fill distribution:
	 0 - 19% = 0
	20 - 39% = 1
	40 - 59% = 613
	60 - 79% = 0
	80 - 99% = 0

C:\1INSTALL\FIREBIRD\FB25>gstat -r TMPUNCOMPRESSED.FDB
<... skipped ...>
Analyzing database pages ...
T (128)
    Primary pointer page: 148, Index root page: 149
     Average record length: 73.00 , total records: 100000
    Average version length: 0.00, total versions: 0, max versions: 0
    Data pages: 1409, data page slots: 1409, average fill: 78%
    Fill distribution:
	 0 - 19% = 0
	20 - 39% = 1
	40 - 59% = 0
	60 - 79% = 1408
	80 - 99% = 0