Might not be. Pretty close to STDDEV. I'd give it one more run through sysbench.

Brian Aker wrote:
Hi!

So a write performance problem?

Cheers,
        -Brian

On Dec 23, 2009, at 4:42 AM, drizzle-x4450 wrote:

=========================================================================================================
REGRESSION REPORT
=========================================================================================================
MACHINE:  drizzle-x4450
RUN ID:   766
RUN DATE: 2009-12-23T02:37:43.155828
WORKLOAD: innodb_1000K_readwrite
SERVER:   drizzled
VERSION:  lp:~mordred/drizzle/remove-ilist
REVISION: 1252
COMMENT:  1252: Monty Taylor 2009-12-23 [merge] Merged trunk.
=========================================================================================================

TRENDING OVER LAST 5 runs
Conc TPS % Diff from Avg Diff Norm? Min Max Avg STD =========================================================================================================
2         629.16          +0.70%       4.34   within norms     596.07     
644.12     624.81      15.67
4         823.89         -12.19%    -114.35   within norms     782.14    
1171.96     938.24     152.11
8        1343.28         -21.82%    -374.83  outside norms    1317.68    
1961.08    1718.12     267.01
16       2004.74          -8.42%    -184.34  outside norms    1972.28    
2448.69    2189.08     181.84
32       2541.56          -5.64%    -152.05  outside norms    2522.66    
2800.12    2693.61     110.52
64       2119.74          -2.22%     -48.17   within norms    2055.13    
2366.53    2167.92      96.75
128      2001.11          -5.87%    -124.88   within norms    1952.73    
2370.65    2125.99     129.52
256      1927.88          -2.11%     -41.46   within norms    1845.89    
2086.93    1969.35      77.21
512      1758.00          -0.69%     -12.14   within norms    1751.79    
1790.62    1770.14      14.26
1024      980.60          +0.66%       6.39   within norms     961.39     
982.50     974.21       7.08
=========================================================================================================

TRENDING OVER Last 20 runs

Conc TPS % Diff from Avg Diff Norm? Min Max Avg STD =========================================================================================================
2         629.16          +0.70%       4.34   within norms     596.07     
644.12     624.81      15.67
4         823.89         -12.19%    -114.35   within norms     782.14    
1171.96     938.24     152.11
8        1343.28         -21.82%    -374.83  outside norms    1317.68    
1961.08    1718.12     267.01
16       2004.74          -8.42%    -184.34  outside norms    1972.28    
2448.69    2189.08     181.84
32       2541.56          -5.64%    -152.05  outside norms    2522.66    
2800.12    2693.61     110.52
64       2119.74          -2.22%     -48.17   within norms    2055.13    
2366.53    2167.92      96.75
128      2001.11          -5.87%    -124.88   within norms    1952.73    
2370.65    2125.99     129.52
256      1927.88          -2.11%     -41.46   within norms    1845.89    
2086.93    1969.35      77.21
512      1758.00          -0.69%     -12.14   within norms    1751.79    
1790.62    1770.14      14.26
1024      980.60          +0.66%       6.39   within norms     961.39     
982.50     974.21       7.08
=========================================================================================================

TRENDING OVER ALL runs

Conc TPS % Diff from Avg Diff Norm? Min Max Avg STD =========================================================================================================
2         629.16          +0.70%       4.34   within norms     596.07     
644.12     624.81      15.67
4         823.89         -12.19%    -114.35   within norms     782.14    
1171.96     938.24     152.11
8        1343.28         -21.82%    -374.83  outside norms    1317.68    
1961.08    1718.12     267.01
16       2004.74          -8.42%    -184.34  outside norms    1972.28    
2448.69    2189.08     181.84
32       2541.56          -5.64%    -152.05  outside norms    2522.66    
2800.12    2693.61     110.52
64       2119.74          -2.22%     -48.17   within norms    2055.13    
2366.53    2167.92      96.75
128      2001.11          -5.87%    -124.88   within norms    1952.73    
2370.65    2125.99     129.52
256      1927.88          -2.11%     -41.46   within norms    1845.89    
2086.93    1969.35      77.21
512      1758.00          -0.69%     -12.14   within norms    1751.79    
1790.62    1770.14      14.26
1024      980.60          +0.66%       6.39   within norms     961.39     
982.50     974.21       7.08
=========================================================================================================
FULL REVISION COMMENTARY:

 1245.1.6: Brian Aker 2009-12-21 [merge] Merging in massif option to test-r...
   1247.1.1: Stewart Smith 2009-12-21 add option to test-run.pl to run with...
 1245.1.5: Brian Aker 2009-12-21 [merge] Merge Monty
   1241.9.40: Monty Taylor 2009-12-21 Fixed OSX.
   1241.9.39: Monty Taylor 2009-12-21 Added a few extra includes for Solaris.
   1241.9.38: Monty Taylor 2009-12-21 Ho-ho. There were a bunch of files th...
   1241.9.37: Monty Taylor 2009-12-21 Removed the server_includes.h and glo...
   1241.9.36: Monty Taylor 2009-12-21 ZOMG. I deleted drizzled/server_inclu...
   1241.9.35: Monty Taylor 2009-12-21 Removed the last bits of server_inclu...
   1241.9.34: Monty Taylor 2009-12-21 Removed errmsg_printf from server_inc...
   1241.9.33: Monty Taylor 2009-12-21 Moved most of the global vars to set_...
   1241.9.32: Monty Taylor 2009-12-21 Moved global myisam and heap pointers...
   1241.9.31: Monty Taylor 2009-12-21 Moved global pthread variables into t...
   1241.9.30: Monty Taylor 2009-12-21 More cruft gone.
   1241.9.29: Monty Taylor 2009-12-21 Removed some globals from server_incl...
   1241.9.28: Monty Taylor 2009-12-21 Removed global_charset_info.h from se...
   1241.9.27: Monty Taylor 2009-12-21 Removed mysys/m_sys.h from server_inc...
   1241.9.26: Monty Taylor 2009-12-20 Removed forward declares from server_...
   1241.9.25: Monty Taylor 2009-12-20 Removed global LEX_STRING ref from se...
   1241.9.24: Monty Taylor 2009-12-20 Removed m_string.h from server_includ...
   1241.9.23: Monty Taylor 2009-12-20 Removed sql_table.h from server_inclu...
   1241.9.22: Monty Taylor 2009-12-20 Removed some bits from drizzled/commo...
   1241.9.21: Monty Taylor 2009-12-20 Removed sql_string.h from server_incl...
   1241.9.20: Monty Taylor 2009-12-20 Removed global sql_list.h include.
   1241.9.19: Monty Taylor 2009-12-20 Removed global cstdlib include.
   1241.9.18: Monty Taylor 2009-12-20 Removed global string.
   1241.9.17: Monty Taylor 2009-12-20 Removed more bits from server_includes.
   1241.9.16: Monty Taylor 2009-12-20 Removed global bitsets.
   1241.9.15: Monty Taylor 2009-12-20 Moved last of the global function dec...
   1241.9.14: Monty Taylor 2009-12-20 Removed things from server_includes.h.
   1241.9.13: Monty Taylor 2009-12-20 [merge] Merged latest out-of-tree.
     1241.12.10: Monty Taylor 2009-12-19 [merge] One more time.
       1241.13.8: Monty Taylor 2009-12-19 Put in a line to remove old cruft...
     1241.12.9: Monty Taylor 2009-12-19 [merge] Merged from me.
       1241.14.2: Monty Taylor 2009-12-17 Removed virtual destructor on sql...
       1241.14.1: Monty Taylor 2009-12-17 [merge] Merged latest header fixe...
     1241.12.8: Monty Taylor 2009-12-19 [merge] Merged with latest header-f...
       1241.13.7: Monty Taylor 2009-12-19 [merge] Merged with trunk.
       1241.13.6: Monty Taylor 2009-12-17 Fixed solaris build.
     1241.12.7: Monty Taylor 2009-12-17 [merge] Merged up latest header-fixes.
       1241.13.5: Monty Taylor 2009-12-17 Wow. This script was SO not /bin/sh.
       1241.13.4: Monty Taylor 2009-12-17 Fixed FreeBSD nonsense.
       1241.13.3: Monty Taylor 2009-12-17 [merge] Merged trunk.
       1241.13.2: Monty Taylor 2009-12-17 Merged in change from Trond.
     1241.12.6: Monty Taylor 2009-12-17 We don't actually support an array ...
     1241.12.5: Monty Taylor 2009-12-15 Replace hand-rolled libm check with...
     1241.12.4: Monty Taylor 2009-12-15 Fixed distcheck.
     1241.12.3: Monty Taylor 2009-12-15 Fixed missing semi-colons.
     1241.12.2: Monty Taylor 2009-12-15 [merge] Merged re-addition of my_of...
       1241.13.1: Monty Taylor 2009-12-15 Put my_off_t back... but this tim...
     1241.12.1: Monty Taylor 2009-12-15 Fixed a few plugins.
   1241.9.12: Monty Taylor 2009-12-20 Trims more out of server_includes.h.
   1241.9.11: Robert Collins 2009-12-20 Fixed a sort order problem which wa...
   1241.9.10: Monty Taylor 2009-12-14 [merge] pandora-build v0.85 - Fixed t...
     1241.11.2: Monty Taylor 2009-12-14 Fixed symlinks.
     1241.11.1: Monty Taylor 2009-12-14 pandora-build v0.85 - Fixed C++ sta...
   1241.9.9: Monty Taylor 2009-12-14 [merge] Merged in some icc warning fix...
     1240.9.6: Monty Taylor 2009-12-08 Removed some casts- also removed a f...
     1240.9.5: Monty Taylor 2009-12-08 remark #82: storage class is not first
     1240.9.4: Monty Taylor 2009-12-08 destructor for base class "Open_tabl...
     1240.9.3: Monty Taylor 2009-12-08 remark #444: destructor for base cla...
     1240.9.2: Monty Taylor 2009-12-08 Fixed: warning #2203: cast discards ...
     1240.9.1: Monty Taylor 2009-12-08 Fixed: remark #444: destructor for b...
   1241.9.8: Monty Taylor 2009-12-14 [merge] Removed some plugin loading cr...
     1241.10.7: Monty Taylor 2009-12-14 Removed some cruft.
     1241.10.6: Monty Taylor 2009-12-14 Removed the mem_root from plugin::M...
     1241.10.5: Monty Taylor 2009-12-12 Removed hardcoded option options ar...
   1241.9.7: Monty Taylor 2009-12-14 Fixed setting of C++ standard.
   1241.9.6: Monty Taylor 2009-12-13 Enhanced our version of array_elements.
   1241.9.5: Monty Taylor 2009-12-13 Fixed the plugin script to not bork pl...
   1241.9.4: Monty Taylor 2009-12-13 Beginnings of what we need to do to su...
   1241.9.3: Monty Taylor 2009-12-13 Fixed the out-of-tree plugin file gene...
   1241.9.2: Monty Taylor 2009-12-13 [merge] Merged meta-info branch.
     1241.10.4: Monty Taylor 2009-12-12 Actually throw errors on failure to...
     1241.10.3: Monty Taylor 2009-12-12 Throw an error on invalid library v...
     1241.10.2: Monty Taylor 2009-12-11 Added support for embedding the dri...
     1241.10.1: Monty Taylor 2009-12-09 Added ability to specify all of the...
   1241.9.1: Monty Taylor 2009-12-11 Removed global.h. Fixed all the headers.
 1245.1.4: Brian Aker 2009-12-21 [merge] Merge Valgrind.
   1241.8.1: Monty Taylor 2009-12-21 More valgrind suppressions.

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