-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi!
Somewhere in r990, we have had a significant regression, most evident in concurrency levels greater than 128 concurrent connections: +-----------+-------------+-------------+ | version | concurrency | tps | +-----------+-------------+-------------+ | trunk-989 | 2 | 1050.630000 | | trunk-989 | 4 | 1417.433333 | | trunk-989 | 8 | 1942.686667 | | trunk-989 | 16 | 2612.166667 | | trunk-989 | 32 | 3389.150000 | | trunk-989 | 64 | 3944.433333 | | trunk-989 | 128 | 3924.076667 | | trunk-989 | 256 | 2964.776667 | | trunk-989 | 512 | 1981.050000 | | trunk-989 | 1024 | 1273.133333 | | trunk-989 | 2048 | 563.350000 | | trunk-990 | 2 | 1038.133333 | | trunk-990 | 4 | 1381.933333 | | trunk-990 | 8 | 1897.276667 | | trunk-990 | 16 | 2547.196667 | | trunk-990 | 32 | 3331.570000 | | trunk-990 | 64 | 3896.483333 | | trunk-990 | 128 | 3850.016667 | | trunk-990 | 256 | 2331.543333 | | trunk-990 | 512 | 1862.316667 | | trunk-990 | 1024 | 1103.903333 | | trunk-990 | 2048 | 436.976667 | +-----------+-------------+-------------+ The above TPS column is the average of 3 iterations of a readonly sysbench workload for the revision/concurrency pair. Unfortunately, r990 was a very big revision with a lot of changes: http://bazaar.launchpad.net/~drizzle-developers/drizzle/development/revision/990 This makes it very difficult to tell what precisely has caused the regression. I'd like to suggest that going forward, we really try to keep the size of merges and commits small so that it is easier to tell where regressions occur. Anyone interested in looking through the commit diff above is welcome to suggest ideas where regression may have occurred...but it might be, like Brian says, death by a thousand cuts... Cheers! Jay -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkn7x/IACgkQ2upbWsB4UtGRbACePfp2Xfa6eE5tscUlRf+7uXcx +kAAn1CGTS/UgS9Z0ky0YniuxBXeSnYp =qh5r -----END PGP SIGNATURE----- _______________________________________________ Mailing list: https://launchpad.net/~drizzle-discuss Post to : [email protected] Unsubscribe : https://launchpad.net/~drizzle-discuss More help : https://help.launchpad.net/ListHelp
