MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 04/28/01 through 05/04/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 49,022 2,630,493
MED90 10,366 188,104
MED85 8,067 72,793
MED80 7,099 42,042
MED75 6,611 20,674
MED66 6,734 23,704
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,215 58,478
2-4 a.m. 779 17,233
4-6 a.m. 323 16,371
6-8 a.m. 1,112 31,865
8-10 a.m. 6,331 217,387
10-12 a.m. 13,581 462,966
12-2 p.m. 15,251 538,273
2-4 p.m. 17,993 547,984
4-6 p.m. 13,623 478,269
6-8 p.m. 7,838 264,069
8-10 p.m. 5,323 208,290
10-12 p.m. 3,530 136,625
__________ _____________ _________________
Total: 87,899 2,977,810
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 718
Davis 677
Irvine 24
Los Angeles 416
Riverside 45
San Diego 567
San Francisco 881
Santa Barbara 23
Santa Cruz 48
Lawrence Berkeley 10
Lawrence Livermore 29
Los Alamos 8
MELWEB 68,152
Searchlight 15,538
Other - UC 48
Other-Network UC 715
_____
87,899
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 6,045
Davis 6,019
Irvine 306
Los Angeles 5,353
Riverside 373
San Diego 5,112
San Francisco 13,544
Santa Barbara 116
Santa Cruz 232
Lawrence Berkeley 77
Lawrence Livermore 258
Los Alamos 26
MELWEB 2,908,509
Searchlight 15,980
Other - UC 156
Other-Network UC 15,704
_____
2,977,810
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.5
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 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:44
Average session length (minutes:seconds) 16:48
Longest session recorded (minutes:seconds) 352:45
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 451.5
Retrievals per search - standard deviation 5900.5
Percent of searches completed with 0 results 35.3%
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 87,899 13.6%
PRESENT 518,549 80.0%
INIT or CLOSE 41,787 6.4%
OTHER 280 0.0%
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 4,982 4.1% 1,957 39.3% 4 1144.4 6506.0
PERSONAL AUTHOR 23,844 19.8% 7,075 29.7% 7 95.1 1268.4
TITLE WORD 9,187 7.6% 3,624 39.4% 4 151.2 1460.4
SUBSET 199 0.2% 55 27.6% 27 337.0 1343.3
SUBJECT WORD 240 0.2% 125 52.1% 10 266.3 1177.7
SUBJECT 2,349 1.9% 1,262 53.7% 16 616.5 4520.9
EXACT SUBJECT 4,700 3.9% 1,213 25.8% 33 741.6 4527.0
MAJOR SUBJECT 133 0.1% 59 44.4% 18 309.4 888.1
EXACT MAJOR SUBJ 454 0.4% 118 26.0% 23 402.0 1675.8
EXACT TITLE 780 0.6% 480 61.5% 1 10.5 73.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,014 0.8% 271 26.7% 473 2487.9 5355.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 7 0.0% 6 85.7% 67 67.0 0.0
KEYWORD 54,465 45.2% 20,024 36.8% 17 884.9 9038.7
DATE 1,823 1.5% 437 24.0% 6 98.9 533.4
LANGUAGE 6,190 5.1% 1,725 27.9% 27 506.1 3045.8
UNIQUE ID 118 0.1% 32 27.1% 1 1.0 0.0
ADDED 1,021 0.8% 899 88.1% 5 24.4 62.4
PUB TYPE 2,859 2.4% 690 24.1% 21 197.5 787.1
AUTHOR AFFIL. 772 0.6% 352 45.6% 9 93.7 1061.0
CHEMICAL NAME 16 0.0% 14 87.5% 7 6.5 2.1
EXACT CHEMICAL 4 0.0% 2 50.0% 63 63.0 83.4
AT 4,535 3.8% 1,386 30.6% 21 529.7 2783.4
AGE 300 0.2% 65 21.7% 15 128.1 321.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 154 0.1% 33 21.4% 72 690.4 2043.6
XXS 296 0.2% 171 57.8% 14 150.8 575.3
XMXS 76 0.1% 36 47.4% 13 38.0 62.2
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 42 0.0% 34 80.9% 11 43.5 51.1
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 22,715 25.8% 8,115 35.7% 9 341.1 2781.2
Single 65,184 74.2% 22,899 35.1% 16 820.8 8331.5
PRESENT commands, by type:
MARC 28.7%
OPAC 28.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS