MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/19/00 through 08/25/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,161 2,004,423
MED90 8,036 192,869
MED85 5,585 61,958
MED80 4,730 32,132
MED75 4,325 21,968
MED66 4,330 25,210
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,609 29,499
2-4 a.m. 608 10,371
4-6 a.m. 304 9,716
6-8 a.m. 975 28,838
8-10 a.m. 5,290 188,476
10-12 a.m. 11,470 422,734
12-2 p.m. 11,819 399,837
2-4 p.m. 13,808 494,066
4-6 p.m. 11,188 398,398
6-8 p.m. 4,880 180,045
8-10 p.m. 2,690 107,684
10-12 p.m. 1,526 68,896
__________ _____________ _________________
Total: 66,167 2,338,560
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 270
Davis 1,017
Irvine 97
Los Angeles 608
Riverside 29
San Diego 1,002
San Francisco 1,153
Santa Barbara 195
Santa Cruz 5
Lawrence Berkeley 4
Lawrence Livermore 65
Los Alamos 0
MELWEB 53,597
Searchlight 7,502
Other - UC 23
Other-Network UC 600
_____
66,167
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,429
Davis 6,552
Irvine 646
Los Angeles 9,354
Riverside 257
San Diego 10,164
San Francisco 17,112
Santa Barbara 2,907
Santa Cruz 13
Lawrence Berkeley 66
Lawrence Livermore 1,000
Los Alamos 0
MELWEB 2,240,239
Searchlight 25,486
Other - UC 283
Other-Network UC 22,052
_____
2,338,560
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 3.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:30
Average session length (minutes:seconds) 19:42
Longest session recorded (minutes:seconds) 194:56
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 380.5
Retrievals per search - standard deviation 3764.0
Percent of searches completed with 0 results 31.5%
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 66,167 12.3%
PRESENT 442,018 82.4%
INIT or CLOSE 27,694 5.2%
OTHER 774 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 4,584 4.9% 1,735 37.8% 5 785.7 4036.8
PERSONAL AUTHOR 22,013 23.4% 5,749 26.1% 7 86.1 694.1
TITLE WORD 7,356 7.8% 2,525 34.3% 3 178.4 1876.2
SUBSET 172 0.2% 31 18.0% 30 443.5 2401.2
SUBJECT WORD 243 0.3% 122 50.2% 4 78.2 189.5
SUBJECT 1,774 1.9% 947 53.4% 24 418.0 3693.0
EXACT SUBJECT 3,907 4.1% 997 25.5% 34 556.1 4793.3
MAJOR SUBJECT 178 0.2% 66 37.1% 16 947.5 4000.3
EXACT MAJOR SUBJ 389 0.4% 82 21.1% 13 238.9 1099.7
EXACT TITLE 574 0.6% 309 53.8% 1 10.4 64.8
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,211 1.3% 470 38.8% 179 1315.6 3028.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 19 0.0% 4 21.1% 33 421.9 997.1
KEYWORD 36,780 39.1% 12,210 33.2% 17 771.7 5788.8
DATE 1,918 2.0% 394 20.5% 7 143.1 603.3
LANGUAGE 5,042 5.4% 1,346 26.7% 27 381.6 3748.7
UNIQUE ID 308 0.3% 80 26.0% 1 1.0 0.2
ADDED 1,186 1.3% 652 55.0% 4 10.4 17.1
PUB TYPE 2,408 2.6% 568 23.6% 26 150.5 477.6
AUTHOR AFFIL. 615 0.7% 230 37.4% 7 198.9 1778.3
CHEMICAL NAME 13 0.0% 13 100% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,946 3.1% 884 30.0% 18 481.3 6812.4
AGE 189 0.2% 32 16.9% 39 242.0 715.6
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 77 0.1% 11 14.3% 29 261.5 750.6
XXS 171 0.2% 60 35.1% 30 1669.3 11202.4
XMXS 94 0.1% 37 39.4% 14 764.8 3665.9
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 7 0.0% 3 42.9% 15 441.0 862.1
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 19,041 28.8% 6,174 32.4% 7 240.7 3627.6
Single 47,126 71.2% 14,656 31.1% 16 679.9 4844.2
PRESENT commands, by type:
MARC 34.4%
OPAC 29.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS