MELSRV INSPEC DATABASES Z39.50 SERVER STATISTICS
Time period: 04/01/02 through 04/30/02
1.0 SUMMARY STATISTICS
_______________________
Relative use of INSPEC databases:
Number of
Searches Records Presented
________ _________________
INS (current) 44,120 1,550,830
INS90 15,251 112,730
INS85 13,281 60,837
INS80 12,603 37,383
INS69 12,895 64,811
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,807 40,902
2-4 a.m. 1,061 22,536
4-6 a.m. 559 19,454
6-8 a.m. 993 29,579
8-10 a.m. 5,812 98,709
10-12 a.m. 14,367 271,825
12-2 p.m. 15,062 273,252
2-4 p.m. 20,356 368,897
4-6 p.m. 16,393 316,534
6-8 p.m. 9,486 191,588
8-10 p.m. 6,098 110,499
10-12 p.m. 5,156 82,816
__________ _____________ _________________
Total: 98,150 1,826,591
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 263
Davis 597
Irvine 28
Los Angeles 175
Riverside 241
San Diego 136
San Francisco 34
Santa Barbara 135
Santa Cruz 35
Lawrence Berkeley 203
Lawrence Livermore 94
Los Alamos 0
MELWEB 80,252
Searchlight 15,479
Other - UC 273
Other-Network UC 205
_____
98,150
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,530
Davis 2,868
Irvine 965
Los Angeles 1,867
Riverside 1,365
San Diego 2,081
San Francisco 178
Santa Barbara 1,787
Santa Cruz 539
Lawrence Berkeley 3,263
Lawrence Livermore 2,044
Los Alamos 0
MELWEB 1,797,262
Searchlight 6,277
Other - UC 331
Other-Network UC 3,234
_____
1,826,591
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.3
Standard deviation in seconds 8.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 INSPEC Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:06
Average session length (minutes:seconds) 18:02
Longest session recorded (minutes:seconds) 269:42
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 382.5
Retrievals per search - standard deviation 4743.9
Percent of searches completed with 0 results 35.4%
Percent of searches entered that are long 0.7%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 98,150 20.7%
PRESENT 324,364 68.3%
INIT or CLOSE 52,154 11.0%
OTHER 566 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 29,203 24.6% 9,145 31.3% 9 77.6 684.9
TITLE WORD 22,079 18.6% 9,266 42.0% 4 75.4 503.5
EXACT TITLE 1,258 1.1% 733 58.3% 1 8.3 59.9
JOURNAL 4,194 3.5% 2,019 48.1% 7 1875.7 10046.4
EXACT JOURNAL 1,115 0.9% 479 43.0% 394 4339.4 12133.7
SUBJECT 3,877 3.3% 1,979 51.0% 9 311.5 1952.3
EXACT SUBJECT 755 0.6% 237 31.4% 4 287.6 1703.1
THESAURUS 4 0.0% 0 0.0% 75 105.5 127.3
EXACT THESAURUS 164 0.1% 17 10.4% 13 769.2 3579.9
KEYWORD 46,524 39.2% 16,085 34.6% 16 912.5 7844.2
SUBFILE 71 0.1% 16 22.5% 44 372.4 1527.9
FORM 1,033 0.9% 261 25.3% 17 258.7 1488.4
DATE 908 0.8% 162 17.8% 8 91.6 566.6
ADDED 347 0.3% 201 57.9% 3 9.4 14.4
ARTICLE 48 0.0% 7 14.6% 26 1347.4 4769.5
AUTHOR AFFIL. 1,131 1.0% 517 45.7% 9 123.4 1314.4
CONFERENCE 228 0.2% 86 37.7% 6 125.4 385.6
LANGUAGE 2,397 2.0% 585 24.4% 24 650.7 4390.6
CHEMICAL NAME 764 0.6% 429 56.1% 8 51.7 196.2
ISSN 22 0.0% 14 63.6% 1,270 1579.1 2036.8
ISBN 8 0.0% 6 75.0% 91 91.0 21.2
ID NUMBER 2 0.0% 1 50.0% 1 1.0 0.0
PRODUCT NUMBER 5 0.0% 5 100% 0 0.0 0.0
STANDARD NUMBER 18 0.0% 16 88.9% 1 1.0 0.0
ISN 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,400 2.0% 824 34.3% 15 794.6 5343.5
Other indexes 16 0.0% 15 93.8% 7 7.0 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 17,480 17.8% 7,264 41.6% 6 285.6 3301.1
Single 80,670 82.2% 27,491 34.1% 13 651.0 6266.8
PRESENT commands, by type:
MARC 37.3%
OPAC 33.1%
SINmm/dd srv.ins MELSRV INSPEC DATABASES Z39.50 SERVER STATISTICS (weekly)