MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 03/03/01 through 03/09/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 54,996 2,727,975
MED90 12,181 205,152
MED85 9,582 80,989
MED80 8,631 40,164
MED75 8,202 29,243
MED66 8,364 35,821
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,616 60,740
2-4 a.m. 1,006 13,917
4-6 a.m. 337 9,597
6-8 a.m. 1,223 30,346
8-10 a.m. 6,744 207,669
10-12 a.m. 17,175 510,115
12-2 p.m. 16,455 500,728
2-4 p.m. 18,803 581,922
4-6 p.m. 16,596 515,548
6-8 p.m. 9,415 311,543
8-10 p.m. 7,461 217,153
10-12 p.m. 4,125 160,066
__________ _____________ _________________
Total: 101,956 3,119,344
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 458
Davis 889
Irvine 60
Los Angeles 490
Riverside 32
San Diego 715
San Francisco 1,253
Santa Barbara 13
Santa Cruz 32
Lawrence Berkeley 29
Lawrence Livermore 17
Los Alamos 46
MELWEB 78,721
Searchlight 18,489
Other - UC 67
Other-Network UC 645
_____
101,956
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,292
Davis 9,141
Irvine 892
Los Angeles 5,667
Riverside 173
San Diego 5,840
San Francisco 10,681
Santa Barbara 0
Santa Cruz 766
Lawrence Berkeley 332
Lawrence Livermore 14
Los Alamos 3,862
MELWEB 3,061,963
Searchlight 96
Other - UC 649
Other-Network UC 14,976
_____
3,119,344
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 4.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:36
Average session length (minutes:seconds) 16:34
Longest session recorded (minutes:seconds) 275:07
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 410.5
Retrievals per search - standard deviation 5392.2
Percent of searches completed with 0 results 36.6%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 101,956 14.4%
PRESENT 555,572 78.6%
INIT or CLOSE 47,766 6.8%
OTHER 1,341 0.2%
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:
JOURNAL 6,547 4.6% 2,870 43.8% 4 938.5 4133.0
PERSONAL AUTHOR 26,425 18.5% 8,253 31.2% 8 84.0 703.9
TITLE WORD 10,636 7.5% 4,201 39.5% 4 161.1 2009.2
SUBSET 262 0.2% 56 21.4% 29 440.5 1912.7
SUBJECT WORD 135 0.1% 85 63.0% 15 1069.8 2420.4
SUBJECT 2,646 1.9% 1,362 51.5% 24 667.5 3072.9
EXACT SUBJECT 6,060 4.2% 1,691 27.9% 25 536.5 3618.4
MAJOR SUBJECT 151 0.1% 80 53.0% 39 176.6 365.8
EXACT MAJOR SUBJ 547 0.4% 156 28.5% 21 210.7 596.8
EXACT TITLE 1,070 0.7% 722 67.5% 1 20.6 309.8
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,436 1.0% 547 38.1% 396 1823.9 3427.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 16 0.0% 9 56.3% 4 47.9 118.3
KEYWORD 64,569 45.2% 24,453 37.9% 18 817.0 8352.6
DATE 2,061 1.4% 652 31.6% 7 132.7 778.0
LANGUAGE 7,974 5.6% 2,371 29.7% 23 461.6 2747.1
UNIQUE ID 226 0.2% 35 15.5% 1 1.0 0.1
ADDED 1,101 0.8% 1,101 100% 0 0.0 0.0
PUB TYPE 3,490 2.4% 941 27.0% 22 177.7 1032.0
AUTHOR AFFIL. 835 0.6% 371 44.4% 9 35.4 131.2
CHEMICAL NAME 3 0.0% 2 66.7% 20 20.0 0.0
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 5,861 4.1% 1,927 32.9% 21 779.7 5721.5
AGE 256 0.2% 66 25.8% 39 260.3 851.7
ISN 4 0.0% 2 50.0% 1 1.0 0.0
ARTICLE 130 0.1% 38 29.2% 27 345.6 1457.3
XXS 177 0.1% 101 57.1% 12 161.0 1018.0
XMXS 56 0.0% 33 58.9% 34 688.9 1974.9
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 59 0.0% 50 84.7% 24 44.0 72.4
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 27,236 26.7% 10,234 37.6% 8 309.9 3033.7
Single 74,720 73.3% 27,127 36.3% 17 768.6 7664.0
PRESENT commands, by type:
MARC 29.0%
OPAC 31.1%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS