MELSRV INSPEC DATABASES Z39.50 SERVER STATISTICS
Time period: 04/01/99 through 04/30/99
1.0 SUMMARY STATISTICS
_______________________
Relative use of INSPEC databases:
Number of
Searches Records Presented
________ _________________
INS (current) 37,366 1,674,693
INS90 7,296 113,113
INS85 4,654 77,122
INS80 2,789 45,434
INS69 2,834 83,692
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,210 35,482
2-4 a.m. 537 10,094
4-6 a.m. 234 4,743
6-8 a.m. 513 23,163
8-10 a.m. 3,316 110,643
10-12 a.m. 8,161 306,206
12-2 p.m. 8,604 318,398
2-4 p.m. 10,993 391,850
4-6 p.m. 10,056 381,218
6-8 p.m. 5,110 182,904
8-10 p.m. 3,514 143,765
10-12 p.m. 2,691 85,588
__________ _____________ _________________
Total: 54,939 1,994,054
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 157
Davis 41
Irvine 42
Los Angeles 41
Riverside 2
San Diego 1,215
San Francisco 14
Santa Barbara 349
Santa Cruz 178
Lawrence Berkeley 264
Lawrence Livermore 166
Los Alamos 0
MELWEB 51,821
Other - UC 366
Other-Network UC 283
_____
54,939
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,532
Davis 309
Irvine 372
Los Angeles 751
Riverside 527
San Diego 2,384
San Francisco 219
Santa Barbara 2,215
Santa Cruz 0
Lawrence Berkeley 5,560
Lawrence Livermore 5,404
Los Alamos 0
MELWEB 1,956,399
Other - UC 10,009
Other-Network UC 7,373
_____
1,994,054
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.9
Standard deviation in seconds 7.6
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.8
2.0 INSPEC Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 23:36
Average session length (minutes:seconds) 26:09
Longest session recorded (minutes:seconds) 327:03
Average number of searches completed per session 0.0
Retrievals per search - median 5.0
Retrievals per search - average 485.8
Retrievals per search - standard deviation 5315.0
Percent of searches completed with 0 results 27.3%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 54,939 12.4%
PRESENT 372,395 84.0%
INIT or CLOSE 15,153 3.4%
OTHER 587 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 23,278 32.3% 6,412 27.5% 10 83.5 1118.8
TITLE WORD 10,974 15.2% 3,887 35.4% 4 124.0 1087.4
EXACT TITLE 1,034 1.4% 512 49.5% 1 15.3 99.4
JOURNAL 3,650 5.1% 1,783 48.8% 8 1116.5 6340.5
EXACT JOURNAL 1,036 1.4% 450 43.4% 393 3153.9 7574.3
SUBJECT 2,975 4.1% 1,123 37.7% 13 408.5 2727.7
EXACT SUBJECT 843 1.2% 173 20.5% 4 388.6 1582.5
THESAURUS 29 0.0% 20 69.0% 804 2091.9 2472.3
EXACT THESAURUS 308 0.4% 52 16.9% 39 1268.3 3226.7
KEYWORD 18,404 25.5% 3,770 20.5% 30 1302.9 9552.8
SUBFILE 196 0.3% 37 18.9% 30 182.0 517.8
FORM 762 1.1% 211 27.7% 17 361.8 3025.2
DATE 717 1.0% 192 26.8% 18 120.6 620.7
ADDED 243 0.3% 209 86.0% 7 45.9 141.9
ARTICLE 351 0.5% 68 19.4% 34 328.6 1303.2
AUTHOR AFFIL. 1,128 1.6% 507 44.9% 10 155.9 705.6
CONFERENCE 237 0.3% 98 41.3% 133 4118.8 22262.1
LANGUAGE 2,388 3.3% 556 23.3% 43 773.5 3532.8
CHEMICAL NAME 235 0.3% 117 49.8% 13 116.6 445.2
ISSN 12 0.0% 7 58.3% 9 106.2 136.8
ISBN 12 0.0% 10 83.3% 187 186.5 260.9
ID NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
PRODUCT NUMBER 2 0.0% 1 50.0% 71 71.0 0.0
STANDARD NUMBER 21 0.0% 17 80.9% 7 9.5 10.1
ISN 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,221 4.5% 953 29.6% 21 730.9 5840.1
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
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 13,776 25.1% 4,993 36.2% 8 379.3 3766.4
Single 41,163 74.9% 10,019 24.3% 16 750.0 6756.2
PRESENT commands, by type:
MARC 34.6%
OPAC 38.3%