MELSRV PSYCINFO DATABASES Z39.50 SERVER STATISTICS                 
               Time period: 09/01/99 through 09/30/99                           
                                                                                
                                                                                
                                                                                
1.0  SUMMARY STATISTICS                                                         
_______________________                                                         
                                                                                
                                                                                
    Per hour usage:                                                             
         Time                    Searches        Records Presented              
    _______________         _____________        _________________              
    12-2  a.m.                        433                   10,744              
     2-4  a.m.                        417                    3,226              
     4-6  a.m.                        131                    1,526              
     6-8  a.m.                        322                    9,287              
     8-10 a.m.                      1,595                   57,543              
    10-12 a.m.                      4,367                  178,601              
    12-2  p.m.                      5,415                  266,051              
     2-4  p.m.                      5,837                  282,232              
     4-6  p.m.                      3,974                  207,090              
     6-8  p.m.                      1,862                  104,092              
     8-10 p.m.                      1,193                   57,522              
    10-12 p.m.                        808                   32,232              
    __________              _____________        _________________              
        Total:                     26,354                1,210,146              
                                                                                
1.1  SEARCH commands                                                            
____________________                                                            
                                                                                
Zero results may indicate no access to the database                             
                                                                                
Number of SEARCH commands issued by location:                                   
Location                                                       Total            
________                                                       _____            
Berkeley                                                         120            
Davis                                                            311            
Irvine                                                            47            
Los Angeles                                                      411            
Riverside                                                          0            
San Diego                                                      1,540            
San Francisco                                                     56            
Santa Barbara                                                    132            
Santa Cruz                                                       194            
Lawrence Berkeley                                                  0            
Lawrence Livermore                                                 1            
Los Alamos                                                         0            
MELWEB                                                        22,072            
Other - UC                                                     1,031            
Other-Network UC                                                 439            
                                                               _____            
                                                              26,354            
                                                                                
                                                                                
1.2  Records Presented                                                          
______________________                                                          
                                                                                
Zero results may indicate no access to the database                             
                                                                                
Number of Records Presented by location:                                        
                                                                                
Location                                                       Total            
________                                                       _____            
Berkeley                                                       2,804            
Davis                                                          1,698            
Irvine                                                           735            
Los Angeles                                                    5,868            
Riverside                                                          0            
San Diego                                                      7,851            
San Francisco                                                  1,617            
Santa Barbara                                                  2,236            
Santa Cruz                                                         0            
Lawrence Berkeley                                                  0            
Lawrence Livermore                                                 3            
Los Alamos                                                         0            
MELWEB                                                     1,162,486            
Other - UC                                                    16,785            
Other-Network UC                                               8,063            
                                                               _____            
                                                           1,210,146            
                                                                                
1.3  Response time                                                              
__________________                                                              
                                                                                
Search response time from receipt of search request                             
DLA until transmission of search response:                                      
  Average in seconds                                         1.8                
  Standard deviation in seconds                              6.5                
                                                                                
Present response time from receipt of present request                           
DLA until transmission of a present response:                                   
  Average in seconds                                         0.5                
  Standard deviation in seconds                              1.0                
                                                                                
                                                                                
2.0  PSYCINFO Database Detailed Statistics                                      
_________________________________________                                       
                                                                                
Median session length (minutes:seconds)                    23:19                
Average session length (minutes:seconds)                   25:22                
Longest session recorded (minutes:seconds)                360:42                
Average number of searches completed per session             0.0                
Retrievals per search - median                               9.0                
Retrievals per search - average                            670.4                
Retrievals per search - standard deviation                6156.2                
Percent of searches completed with 0 results                20.6%               
                                                                                
Percent of searches entered that are long                    0.4%               
Percent of long searches completed                                              
  (includes partial results)                                 100%               
                                                                                
Commands entered, by type, excluding errors:                                    
                                                   Total     Percentage         
                                              __________     __________         
  SEARCH                                          26,354           9.6%         
  PRESENT                                        239,266          87.3%         
  INIT or CLOSE                                    8,159           3.0%         
  OTHER                                              181           0.1%         
SEARCHes completed:                                        RETRIEVALS PER NON-  
                             TOTAL    ZERO RESULTS        ZERO RESULT SEARCHES  
                     _____________  ______________      ______________________  
                              % of            % of                              
                               all         all for                        Std.  
                     No.  SEARCHes     No.   Index  Median       Avg.     Dev.  
                  ______ _________  ______ _______  ______ __________  _______  
  By index:                                                                     
  PERSONAL AUTHOR  9,659     25.0%   1,893   19.6%       9       66.3   1472.7  
  TITLE WORD       2,996      7.8%     935   31.2%       2      105.0    860.2  
  EXACT TITLE        395      1.0%     207   52.4%       1        7.8     29.9  
  JOURNAL          1,632      4.2%     614   37.6%       6      752.0   2409.0  
  EXACT JOURNAL      466      1.2%     187   40.1%     232     1074.9   2285.7  
  SUBJECT          1,687      4.4%     725   43.0%      42     1347.9   5866.5  
  EXACT SUBJECT      439      1.1%     173   39.4%      97     1177.5   3677.5  
  KEYWORD         12,768     33.0%   1,931   15.1%      41     1340.5   9355.5  
  AUTHOR AFFIL        73      0.2%      47   64.4%      28      601.4   1742.6  
  FORM/PUB TYPE      872      2.3%     161   18.5%      54     1024.9   5403.9  
  DATE             1,641      4.2%     326   19.9%      26      341.3   1276.7  
  ADDED              429      1.1%     380   88.6%       5       10.0     18.9  
  CONFERENCE           9      0.0%       6   66.7%      11      608.7   1043.9  
  LANGUAGE         2,484      6.4%     511   20.6%      73     1746.9  10759.3  
  ISSN                 6      0.0%       6    100%       0        0.0      0.0  
  ISBN                 3      0.0%       2   66.7%       1        1.0      0.0  
  ID NUMBER            5      0.0%       5    100%       0        0.0      0.0  
  XXS                 50      0.1%      17   34.0%      38      723.8   1704.9  
  ISN                  0      0.0%       0    0.0%       0        0.0      0.0  
  ARTICLE            143      0.4%      37   25.9%      75     1840.5   8390.8  
  AT               2,066      5.3%     440   21.3%      51     1227.7   5877.5  
  Other indexes      830      2.1%     221   26.6%      70      663.2   2855.2  
                                                                                
                                                           RETRIEVALS PER NON-  
                             TOTAL    ZERO RESULTS        ZERO RESULT SEARCHES  
                     _____________  ______________      ______________________  
                              % of            % of                              
                               all         all for                        Std.  
                     No.  SEARCHes     No.   Index  Median       Avg.     Dev.  
                  ______ _________  ______ _______  ______ __________  _______  
  By number of indexes:                                                         
  Multiple         7,767     29.5%   2,230   28.7%      14      892.8   7155.2  
  Single          18,587     70.5%   3,186   17.1%      26      826.1   6800.7  
                                                                                
                                                                                
                                                                                
PRESENT commands, by type:                                                      
  MARC                                                      45.7%               
  OPAC                                                      35.8%