MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/01/00 through 06/30/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 165,956 7,940,409
MED90 36,654 679,200
MED85 26,130 270,866
MED80 22,332 149,515
MED75 20,368 98,989
MED66 20,550 102,601
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,851 203,942
2-4 a.m. 3,832 86,631
4-6 a.m. 1,285 79,449
6-8 a.m. 3,997 128,569
8-10 a.m. 22,289 720,215
10-12 a.m. 50,739 1,638,513
12-2 p.m. 53,598 1,630,733
2-4 p.m. 62,145 1,923,319
4-6 p.m. 44,957 1,462,662
6-8 p.m. 19,592 633,948
8-10 p.m. 12,864 423,251
10-12 p.m. 8,841 310,348
__________ _____________ _________________
Total: 291,990 9,241,580
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,895
Davis 4,057
Irvine 662
Los Angeles 2,778
Riverside 132
San Diego 4,872
San Francisco 4,860
Santa Barbara 142
Santa Cruz 326
Lawrence Berkeley 271
Lawrence Livermore 103
Los Alamos 8
MELWEB 245,919
Searchlight 23,284
Other - UC 259
Other-Network UC 2,422
_____
291,990
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 15,298
Davis 39,968
Irvine 2,764
Los Angeles 30,351
Riverside 480
San Diego 38,182
San Francisco 51,432
Santa Barbara 3,364
Santa Cruz 4,254
Lawrence Berkeley 3,599
Lawrence Livermore 1,089
Los Alamos 85
MELWEB 8,846,537
Searchlight 178,386
Other - UC 4,311
Other-Network UC 21,480
_____
9,241,580
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 2.9
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.5
Standard deviation in seconds 1.2
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:14
Average session length (minutes:seconds) 18:38
Longest session recorded (minutes:seconds) 251:24
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 383.9
Retrievals per search - standard deviation 5084.5
Percent of searches completed with 0 results 32.9%
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 291,990 13.7%
PRESENT 1,706,978 80.2%
INIT or CLOSE 127,651 6.0%
OTHER 1,325 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 19,731 4.8% 7,606 38.5% 4 757.0 3466.5
PERSONAL AUTHOR 96,435 23.5% 26,877 27.9% 7 75.6 633.2
TITLE WORD 31,052 7.6% 11,310 36.4% 3 160.2 1957.3
SUBSET 602 0.1% 139 23.1% 26 286.6 1177.4
SUBJECT WORD 1,243 0.3% 566 45.5% 8 972.9 7606.0
SUBJECT 8,178 2.0% 4,051 49.5% 16 591.8 4616.6
EXACT SUBJECT 14,402 3.5% 3,675 25.5% 30 528.8 3755.1
MAJOR SUBJECT 547 0.1% 233 42.6% 13 666.3 4065.9
EXACT MAJOR SUBJ 1,384 0.3% 276 19.9% 20 284.3 1589.2
EXACT TITLE 2,678 0.7% 1,483 55.4% 1 14.7 160.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,684 1.1% 1,866 39.8% 227 1368.2 2837.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 54 0.0% 24 44.4% 8 85.4 350.9
KEYWORD 165752 40.4% 57,266 34.5% 16 795.0 8069.7
DATE 9,380 2.3% 2,150 22.9% 5 89.3 676.5
LANGUAGE 20,331 5.0% 5,519 27.1% 25 503.6 4263.4
UNIQUE ID 1,252 0.3% 331 26.4% 1 1.1 0.8
ADDED 4,935 1.2% 2,906 58.9% 5 16.8 31.3
PUB TYPE 8,802 2.1% 2,121 24.1% 23 188.7 1562.0
AUTHOR AFFIL. 2,621 0.6% 1,233 47.0% 8 144.3 1679.9
CHEMICAL NAME 76 0.0% 66 86.8% 4 10.5 17.4
EXACT CHEMICAL 13 0.0% 10 76.9% 4 3.3 2.1
AT 14,223 3.5% 4,291 30.2% 21 691.7 5036.5
AGE 871 0.2% 235 27.0% 27 179.3 752.1
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 491 0.1% 149 30.3% 26 924.2 5484.5
XXS 560 0.1% 245 43.8% 11 311.4 1665.7
XMXS 333 0.1% 147 44.1% 15 282.5 2028.9
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 60 0.0% 40 66.7% 30 158.1 394.1
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 82,192 28.1% 27,882 33.9% 6 257.0 2791.3
Single 209,798 71.8% 68,104 32.5% 15 692.5 7077.2
PRESENT commands, by type:
MARC 33.7%
OPAC 28.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS