MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/17/00 through 06/23/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 34,205 1,684,035
MED90 7,392 147,761
MED85 5,071 53,385
MED80 4,278 32,071
MED75 3,864 19,996
MED66 3,814 21,014
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,214 38,470
2-4 a.m. 869 24,343
4-6 a.m. 220 15,541
6-8 a.m. 820 43,048
8-10 a.m. 5,054 142,044
10-12 a.m. 11,182 374,738
12-2 p.m. 10,830 361,305
2-4 p.m. 13,826 402,872
4-6 p.m. 8,470 303,203
6-8 p.m. 2,988 126,963
8-10 p.m. 1,977 74,833
10-12 p.m. 1,174 50,902
__________ _____________ _________________
Total: 58,624 1,958,262
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 367
Davis 1,064
Irvine 140
Los Angeles 559
Riverside 60
San Diego 1,054
San Francisco 993
Santa Barbara 65
Santa Cruz 26
Lawrence Berkeley 68
Lawrence Livermore 58
Los Alamos 7
MELWEB 49,802
Searchlight 3,891
Other - UC 39
Other-Network UC 431
_____
58,624
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,169
Davis 9,373
Irvine 380
Los Angeles 4,998
Riverside 60
San Diego 8,301
San Francisco 8,985
Santa Barbara 1,912
Santa Cruz 260
Lawrence Berkeley 1,076
Lawrence Livermore 655
Los Alamos 81
MELWEB 1,871,923
Searchlight 43,828
Other - UC 164
Other-Network UC 3,097
_____
1,958,262
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 2.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 0.7
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:37
Average session length (minutes:seconds) 20:02
Longest session recorded (minutes:seconds) 203:27
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 384.9
Retrievals per search - standard deviation 6354.3
Percent of searches completed with 0 results 31.9%
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 58,624 13.2%
PRESENT 359,665 81.2%
INIT or CLOSE 24,551 5.5%
OTHER 242 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 4,323 5.3% 1,650 38.2% 3 647.7 3118.3
PERSONAL AUTHOR 21,290 25.9% 5,810 27.3% 7 73.4 541.3
TITLE WORD 6,262 7.6% 2,035 32.5% 3 244.2 3088.1
SUBSET 131 0.2% 23 17.6% 33 427.8 1780.2
SUBJECT WORD 125 0.2% 57 45.6% 14 431.4 1595.8
SUBJECT 1,686 2.0% 845 50.1% 16 739.6 7196.6
EXACT SUBJECT 2,701 3.3% 645 23.9% 29 771.3 5024.9
MAJOR SUBJECT 150 0.2% 56 37.3% 15 214.4 619.7
EXACT MAJOR SUBJ 257 0.3% 36 14.0% 14 490.4 2919.3
EXACT TITLE 548 0.7% 273 49.8% 1 6.6 34.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 952 1.2% 361 37.9% 231 1277.4 2704.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 31,175 37.9% 10,692 34.3% 15 825.5 10489.9
DATE 2,037 2.5% 434 21.3% 5 73.5 372.5
LANGUAGE 4,014 4.9% 1,119 27.9% 24 504.9 4115.6
UNIQUE ID 266 0.3% 36 13.5% 1 1.1 0.4
ADDED 1,168 1.4% 561 48.0% 5 16.2 32.8
PUB TYPE 1,558 1.9% 360 23.1% 22 151.1 564.2
AUTHOR AFFIL. 563 0.7% 282 50.1% 8 56.7 362.8
CHEMICAL NAME 32 0.0% 28 87.5% 1 1.3 0.5
EXACT CHEMICAL 4 0.0% 4 100% 0 0.0 0.0
AT 2,612 3.2% 804 30.8% 16 600.1 3868.7
AGE 159 0.2% 37 23.3% 13 120.9 424.3
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 61 0.1% 8 13.1% 51 3856.1 12701.7
XXS 116 0.1% 38 32.8% 13 757.9 2719.7
XMXS 74 0.1% 27 36.5% 26 91.0 216.9
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 11 0.0% 8 72.7% 33 23.3 16.7
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 16,768 28.6% 5,563 33.2% 6 227.7 2905.2
Single 41,856 71.4% 13,140 31.4% 15 697.0 8884.5
PRESENT commands, by type:
MARC 33.1%
OPAC 28.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS