Re: Postgresql Performance on an HP DL385 and
| От | Steve Poe |
|---|---|
| Тема | Re: Postgresql Performance on an HP DL385 and |
| Дата | |
| Msg-id | 721b21dc0608082156s477622d5jbc2947d192b2e7bc@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Postgresql Performance on an HP DL385 and ("Luke Lonergan" <llonergan@greenplum.com>) |
| Список | pgsql-performance |
>Sounds like there are a few moving parts here, one of which is the ODBC
>driver.
Yes, I need to use it since my clients use it for their veterinary application.
>First - using 7.4.x postgres is a big variable - not much experience on this
>list with 7.4.x anymore.
Like the previous, we have to use it since the manufacturer/vendor uses a 4GL language which only supports Postgresql 7.4.x
>What OS versions are on the two machines?
Centos 4.3 x84_64 on both boxes.
>What is the network configuration of each - is a caching DNS server
>available to each? What are the contents of /etc/resolv.conf?
>Have you run "top" on the machines while the benchmark is running? What is
>the top running process, what is it doing (RSS, swap, I/O wait, etc)?
I am not running top, but here's an average per second for the 20-25min run from vmstat presented in a high/peak, low and median
Sun box with 4-disc array (4GB RAM. 4 167GB 10K SCSI RAID10 LSI MegaRAID 128MB). This is after 8 runs.
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,swapd,128,128,128
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,free,21596,21050,21327
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,buffers,1171,174,595
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,cache,3514368,3467427,3495081
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,bi,97276,1720,31745
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,bo,9209,832,4674
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,in,25906,23204,24115
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,cs,49849,46035,47617
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,us,12,2,5
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,sy,59,50,53
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,wa,1,0,0
dbserver-dual-opteron-centos,08/08/06,Tuesday,20,id,45,26,38
Average TPS is 75
HP box with 8GB RAM. six disc array RAID10 on SmartArray 642 with 192MB RAM. After 8 runs, I see:
intown-vetstar-amd64,08/09/06,Tuesday,23,r,0,0,0
intown-vetstar-amd64,08/09/06,Tuesday,23,b,2,0,0
intown-vetstar-amd64,08/09/06,Tuesday,23,swapd,0,0,0
intown-vetstar-amd64,08/09/06,Tuesday,23,free,33760,16501,17931
intown-vetstar-amd64,08/09/06,Tuesday,23,buffers,1578,673,1179
intown-vetstar-amd64,08/09/06,Tuesday,23,cache,7881745,7867700,7876327
intown-vetstar-amd64,08/09/06,Tuesday,23,bi,66536,0,4480
intown-vetstar-amd64,08/09/06,Tuesday,23,bo,5991,2,2806
intown-vetstar-amd64,08/09/06,Tuesday,23,in,1624,260,573
intown-vetstar-amd64,08/09/06,Tuesday,23,cs,2342,17,1464
intown-vetstar-amd64,08/09/06,Tuesday,23,us,31,0,3
intown-vetstar-amd64,08/09/06,Tuesday,23,sy,16,0,1
intown-vetstar-amd64,08/09/06,Tuesday,23,wa,99,6,50
intown-vetstar-amd64,08/09/06,Tuesday,23,id,78,0,42
Average TPS is 31.
>Are any of the disks not healthy? Do you see any I/O errors in dmesg?
I don't know. I do the following message:
"PCI: MSI quirk detected. PCI_BUS_FLAGS_NO_MSI set for subordinate bus"
Otherwise, no disc error messages.
Note that tarring up the database directory and untarring it actually
changes the block layout of the files on the disk from what the database
might have done when it was created. When you create a tar archive of the
files in the DB directory, their contents will be packed in file name order
in the tar archive and unpacked that way as well. By comparison, the
ordering when the database lays them on disk might have been quite
different. This doesn't impact the problem you describe as you are
unpacking the tar file on both machines to start the process (right?).
Yes, I am running this on both machines with the same RPMs of Postgresql and same conf files.
Also, just for this testing, I am not unmounting, formatting, untaring. I am doing it once than running the series of tests (usually 10 runs).
Thanks again for your time. If you're in the SF area, I'll owe you lunch and beer.
Steve
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