Re: Commit slower on faster PC

Hello all,
thanks a lot for your help so far. You all where right about the IDE drive is
somehow caching the data. See the test results below. I also get different
tps values every time I run pgbench on PC1 (between 300 and 80 tps for 100 transactions).

I don't think it's a good idea to disable fsync even if ext3 (doing a sync also
every x second or so) and a UPS is used.

Christian

PC1 (IDE):
----------

fsynch on:
----------
number of transactions per client: 100
number of transactions actually processed: 100/100
tps = 213.115558 (including connections establishing)
tps = 214.710227 (excluding connections establishing)

number of transactions per client: 10000
number of transactions actually processed: 10000/10000
tps = 126.159130 (including connections establishing)
tps = 126.163172 (excluding connections establishing)

fsynch off:
-----------
number of transactions per client: 100
number of transactions actually processed: 100/100
tps = 413.849044 (including connections establishing)
tps = 419.028942 (excluding connections establishing)

number of transactions per client: 10000
number of transactions actually processed: 10000/10000
tps = 166.057838 (including connections establishing)
tps = 166.064227 (excluding connections establishing)

PC2 (SCSI):
-----------

fsynch on:
----------
number of transactions per client: 100
number of transactions actually processed: 100/100
tps = 44.640785 (including connections establishing)
tps = 44.684649 (excluding connections establishing)

number of transactions per client: 10000
number of transactions actually processed: 10000/10000
tps = 42.322486 (including connections establishing)
tps = 42.324096 (excluding connections establishing)

fsynch off:
-----------
number of transactions per client: 100
number of transactions actually processed: 100/100
tps = 910.406861 (including connections establishing)
tps = 925.428936 (excluding connections establishing)

number of transactions per client: 10000
number of transactions actually processed: 10000/10000
tps = 957.376543 (including connections establishing)
tps = 957.603815 (excluding connections establishing)

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