MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/16/00 through 12/22/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 31,321 1,677,442
MED90 6,108 121,580
MED85 4,647 40,210
MED80 3,963 21,916
MED75 3,588 16,249
MED66 3,715 17,171
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,667 24,482
2-4 a.m. 537 6,834
4-6 a.m. 245 11,369
6-8 a.m. 779 33,352
8-10 a.m. 4,690 179,808
10-12 a.m. 10,052 341,703
12-2 p.m. 10,377 392,644
2-4 p.m. 11,087 379,919
4-6 p.m. 8,119 275,789
6-8 p.m. 2,853 132,096
8-10 p.m. 1,703 68,023
10-12 p.m. 1,233 48,549
__________ _____________ _________________
Total: 53,342 1,894,568
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 195
Davis 1,124
Irvine 96
Los Angeles 692
Riverside 15
San Diego 470
San Francisco 973
Santa Barbara 2
Santa Cruz 7
Lawrence Berkeley 20
Lawrence Livermore 6
Los Alamos 0
MELWEB 43,953
Searchlight 5,238
Other - UC 68
Other-Network UC 483
_____
53,342
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 1,541
Davis 6,946
Irvine 1,344
Los Angeles 7,246
Riverside 54
San Diego 3,470
San Francisco 8,410
Santa Barbara 102
Santa Cruz 20
Lawrence Berkeley 65
Lawrence Livermore 190
Los Alamos 0
MELWEB 1,860,364
Searchlight 387
Other - UC 416
Other-Network UC 4,013
_____
1,894,568
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 2.6
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.2
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:34
Average session length (minutes:seconds) 20:21
Longest session recorded (minutes:seconds) 236:05
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 386.5
Retrievals per search - standard deviation 5788.5
Percent of searches completed with 0 results 34.6%
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 53,342 13.4%
PRESENT 323,343 81.1%
INIT or CLOSE 21,567 5.4%
OTHER 334 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:
JOURNAL 3,412 4.6% 1,334 39.1% 4 988.9 18465.8
PERSONAL AUTHOR 17,750 24.0% 5,121 28.8% 7 82.2 649.3
TITLE WORD 6,602 8.9% 2,407 36.5% 2 286.4 6061.1
SUBSET 112 0.2% 39 34.8% 20 311.8 1465.4
SUBJECT WORD 165 0.2% 91 55.1% 24 11151.7 46654.3
SUBJECT 1,347 1.8% 722 53.6% 19 879.5 5075.6
EXACT SUBJECT 2,784 3.8% 838 30.1% 31 695.1 8714.7
MAJOR SUBJECT 142 0.2% 47 33.1% 18 999.7 4100.1
EXACT MAJOR SUBJ 307 0.4% 103 33.5% 17 163.9 453.0
EXACT TITLE 396 0.5% 251 63.4% 1 30.8 272.7
TREE NUMBER 1 0.0% 0 0.0% 63 63.0 0.0
EXACT JOURNAL 661 0.9% 214 32.4% 232 1515.6 3312.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 11 0.0% 4 36.4% 25 80.4 108.7
KEYWORD 29,451 39.8% 10,760 36.5% 17 781.1 6761.8
DATE 1,276 1.7% 307 24.1% 8 146.5 1592.0
LANGUAGE 3,594 4.9% 1,261 35.1% 27 324.7 1789.2
UNIQUE ID 359 0.5% 190 52.9% 1 1.1 1.1
ADDED 952 1.3% 951 99.9% 8 8.0 0.0
PUB TYPE 1,578 2.1% 445 28.2% 27 159.6 433.8
AUTHOR AFFIL. 544 0.7% 276 50.7% 6 43.9 184.2
CHEMICAL NAME 16 0.0% 6 37.5% 18 163.5 412.2
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 2,114 2.9% 613 29.0% 21 492.7 2766.3
AGE 148 0.2% 42 28.4% 12 110.9 370.4
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 37 0.1% 11 29.7% 115 2849.5 9371.3
XXS 132 0.2% 79 59.8% 37 1303.6 5680.9
XMXS 68 0.1% 47 69.1% 50 304.1 656.5
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 17 0.0% 13 76.5% 99 151.0 175.5
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 14,767 27.7% 5,519 37.4% 7 263.7 4184.2
Single 38,575 72.3% 12,937 33.5% 15 709.0 7948.8
PRESENT commands, by type:
MARC 29.7%
OPAC 26.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS