MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/05/00 through 08/11/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,211 1,918,727
MED90 8,366 170,588
MED85 6,085 77,915
MED80 5,282 33,173
MED75 4,763 18,311
MED66 4,819 17,841
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,008 23,561
2-4 a.m. 1,185 4,386
4-6 a.m. 246 3,532
6-8 a.m. 862 20,694
8-10 a.m. 5,008 162,352
10-12 a.m. 12,611 406,622
12-2 p.m. 11,413 402,416
2-4 p.m. 15,480 492,000
4-6 p.m. 11,662 369,026
6-8 p.m. 4,572 163,250
8-10 p.m. 2,919 117,450
10-12 p.m. 1,560 71,266
__________ _____________ _________________
Total: 68,526 2,236,555
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 757
Davis 1,269
Irvine 171
Los Angeles 605
Riverside 36
San Diego 875
San Francisco 1,332
Santa Barbara 61
Santa Cruz 2
Lawrence Berkeley 76
Lawrence Livermore 82
Los Alamos 0
MELWEB 57,517
Searchlight 5,346
Other - UC 60
Other-Network UC 337
_____
68,526
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 5,521
Davis 8,011
Irvine 958
Los Angeles 8,063
Riverside 333
San Diego 7,660
San Francisco 11,025
Santa Barbara 408
Santa Cruz 38
Lawrence Berkeley 739
Lawrence Livermore 542
Los Alamos 0
MELWEB 2,184,041
Searchlight 5,464
Other - UC 379
Other-Network UC 3,373
_____
2,236,555
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 3.8
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 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:31
Average session length (minutes:seconds) 19:59
Longest session recorded (minutes:seconds) 223:21
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 360.8
Retrievals per search - standard deviation 4259.6
Percent of searches completed with 0 results 33.7%
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 68,526 13.6%
PRESENT 404,146 80.5%
INIT or CLOSE 29,069 5.8%
OTHER 314 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 4,432 4.5% 1,771 40.0% 4 745.9 3660.3
PERSONAL AUTHOR 21,888 22.1% 6,357 29.0% 7 75.3 580.3
TITLE WORD 7,399 7.5% 3,008 40.7% 3 112.4 744.1
SUBSET 181 0.2% 59 32.6% 26 211.3 838.9
SUBJECT WORD 450 0.5% 284 63.1% 7 179.2 1010.1
SUBJECT 2,161 2.2% 1,042 48.2% 21 676.5 8057.4
EXACT SUBJECT 4,260 4.3% 1,036 24.3% 30 428.4 3069.3
MAJOR SUBJECT 208 0.2% 75 36.1% 15 1236.5 6078.2
EXACT MAJOR SUBJ 367 0.4% 86 23.4% 31 275.1 996.8
EXACT TITLE 733 0.7% 438 59.8% 1 13.4 121.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,385 1.4% 529 38.2% 220 1228.0 2499.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 32 0.0% 24 75.0% 44 73.5 114.6
KEYWORD 38,209 38.6% 13,208 34.6% 16 746.9 6609.6
DATE 2,101 2.1% 607 28.9% 4 56.5 267.7
LANGUAGE 5,706 5.8% 1,626 28.5% 24 473.4 3309.9
UNIQUE ID 490 0.5% 101 20.6% 1 1.0 0.4
ADDED 1,152 1.2% 1,042 90.4% 4 13.0 21.5
PUB TYPE 2,623 2.7% 579 22.1% 25 178.8 1345.8
AUTHOR AFFIL. 746 0.8% 331 44.4% 9 91.3 754.5
CHEMICAL NAME 16 0.0% 13 81.3% 66 142.0 180.4
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 3,714 3.8% 1,218 32.8% 24 664.7 3832.6
AGE 211 0.2% 81 38.4% 30 191.1 443.3
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 87 0.1% 22 25.3% 45 162.0 329.3
XXS 296 0.3% 144 48.6% 15 100.2 314.2
XMXS 51 0.1% 24 47.1% 10 62.2 144.6
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 8 0.0% 2 25.0% 3 12.7 19.4
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 20,570 30.0% 7,644 37.2% 7 249.6 2176.7
Single 47,956 70.0% 15,428 32.2% 15 660.9 6012.8
PRESENT commands, by type:
MARC 32.5%
OPAC 29.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS