Re: PostgreSQL win32 fragmentation issue

Starting point: 1% Fragmentation
transaction type: TPC-B (sort of)
scaling factor: 100
number of clients: 50
number of transactions per client: 1000
number of transactions actually processed: 50000/50000
tps = 46.001927 (including connections establishing)
tps = 46.045008 (excluding connections establishing)

Total Fragmentation: 2%
File Fragmentation: 5%

transaction type: TPC-B (sort of)
scaling factor: 100
number of clients: 50
number of transactions per client: 1000
number of transactions actually processed: 50000/50000
tps = 50.507082 (including connections establishing)
tps = 50.558191 (excluding connections establishing)

Total Fragmentation: 2%
File Fragmentation: 5%

transaction type: TPC-B (sort of)
scaling factor: 100
number of clients: 100
number of transactions per client: 1000
number of transactions actually processed: 100000/100000
tps = 45.976461 (including connections establishing)
tps = 46.026986 (excluding connections establishing)

Total Fragmentation: 2%
File Fragmentation: 5%

Initialize with scaling of 100

Total Fragmentation: 2%
File Fragmentation: 5%

transaction type: TPC-B (sort of)
scaling factor: 100
number of clients: 50
number of transactions per client: 1000
number of transactions actually processed: 50000/50000
tps = 43.054164 (including connections establishing)
tps = 43.090163 (excluding connections establishing)

Total Fragmentation: 2%
File Fragmentation: 5%


O.k. my guess here is that autovacuum is keeping up with the actual
pgbench runs and thus causing reusable tuples? Does that make sense?

Joshua D. Drake




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