MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 01/13/01 through 01/19/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 42,713 2,139,840
MED90 8,836 148,976
MED85 6,675 60,774
MED80 5,735 24,326
MED75 5,258 19,951
MED66 5,287 16,159
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,532 26,477
2-4 a.m. 631 12,248
4-6 a.m. 303 12,556
6-8 a.m. 1,213 23,186
8-10 a.m. 5,358 155,649
10-12 a.m. 11,814 392,946
12-2 p.m. 12,081 412,413
2-4 p.m. 16,604 510,293
4-6 p.m. 11,894 405,638
6-8 p.m. 6,049 194,785
8-10 p.m. 4,691 171,526
10-12 p.m. 2,334 92,309
__________ _____________ _________________
Total: 74,504 2,410,026
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 460
Davis 924
Irvine 141
Los Angeles 718
Riverside 28
San Diego 462
San Francisco 859
Santa Barbara 42
Santa Cruz 0
Lawrence Berkeley 29
Lawrence Livermore 22
Los Alamos 0
MELWEB 60,339
Searchlight 9,473
Other - UC 148
Other-Network UC 859
_____
74,504
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,094
Davis 7,683
Irvine 330
Los Angeles 7,478
Riverside 130
San Diego 6,221
San Francisco 7,927
Santa Barbara 436
Santa Cruz 0
Lawrence Berkeley 189
Lawrence Livermore 441
Los Alamos 0
MELWEB 2,366,663
Searchlight 0
Other - UC 1,556
Other-Network UC 6,878
_____
2,410,026
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 4.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:16
Average session length (minutes:seconds) 18:54
Longest session recorded (minutes:seconds) 256:10
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 470.4
Retrievals per search - standard deviation 7863.1
Percent of searches completed with 0 results 34.4%
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 74,504 13.9%
PRESENT 427,163 79.9%
INIT or CLOSE 31,841 6.0%
OTHER 1,377 0.3%
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 5,510 5.2% 1,943 35.3% 3 1325.9 20159.7
PERSONAL AUTHOR 22,902 21.7% 6,414 28.0% 7 113.3 2717.2
TITLE WORD 8,711 8.2% 3,090 35.5% 2 170.5 2096.0
SUBSET 183 0.2% 45 24.6% 28 138.5 290.7
SUBJECT WORD 254 0.2% 98 38.6% 10 749.6 5353.1
SUBJECT 2,222 2.1% 1,306 58.8% 19 750.6 4239.8
EXACT SUBJECT 4,441 4.2% 1,275 28.7% 29 602.8 4205.7
MAJOR SUBJECT 318 0.3% 185 58.2% 27 1103.8 5533.7
EXACT MAJOR SUBJ 409 0.4% 99 24.2% 26 340.7 926.5
EXACT TITLE 593 0.6% 386 65.1% 1 56.5 640.7
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,058 1.0% 358 33.8% 432 1628.2 3364.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 34 0.0% 9 26.5% 24 62.6 98.1
KEYWORD 42,388 40.1% 15,263 36.0% 18 931.4 10586.4
DATE 1,758 1.7% 514 29.2% 7 441.2 8954.2
LANGUAGE 5,600 5.3% 1,675 29.9% 28 512.8 3500.1
UNIQUE ID 469 0.4% 241 51.4% 1 1.0 0.3
ADDED 991 0.9% 991 100% 0 0.0 0.0
PUB TYPE 2,611 2.5% 645 24.7% 20 154.1 583.7
AUTHOR AFFIL. 755 0.7% 319 42.3% 10 113.9 818.5
CHEMICAL NAME 4 0.0% 2 50.0% 14 13.5 2.1
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 3,968 3.8% 1,349 34.0% 23 715.4 6414.7
AGE 199 0.2% 65 32.7% 36 186.2 956.6
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 123 0.1% 35 28.5% 84 933.0 2397.5
XXS 183 0.2% 112 61.2% 35 296.6 1014.7
XMXS 45 0.0% 24 53.3% 97 4346.6 15128.4
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 20 0.0% 16 80.0% 26 365.8 696.5
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 20,471 27.5% 7,351 35.9% 8 345.1 4480.5
Single 54,033 72.5% 18,296 33.9% 15 853.9 11010.0
PRESENT commands, by type:
MARC 31.6%
OPAC 28.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS