MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/10/00 through 06/16/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 37,412 1,874,976
MED90 8,015 158,898
MED85 5,636 66,405
MED80 4,754 35,358
MED75 4,304 18,763
MED66 4,388 23,519
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,839 39,669
2-4 a.m. 693 19,341
4-6 a.m. 354 22,608
6-8 a.m. 847 15,633
8-10 a.m. 5,070 165,284
10-12 a.m. 11,027 348,496
12-2 p.m. 11,797 373,140
2-4 p.m. 13,575 456,901
4-6 p.m. 9,952 370,242
6-8 p.m. 4,454 140,518
8-10 p.m. 2,733 126,167
10-12 p.m. 2,168 99,920
__________ _____________ _________________
Total: 64,509 2,177,919
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 516
Davis 1,160
Irvine 126
Los Angeles 627
Riverside 28
San Diego 708
San Francisco 1,225
Santa Barbara 26
Santa Cruz 86
Lawrence Berkeley 32
Lawrence Livermore 25
Los Alamos 0
MELWEB 54,877
Searchlight 4,555
Other - UC 73
Other-Network UC 445
_____
64,509
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,486
Davis 9,846
Irvine 733
Los Angeles 5,006
Riverside 183
San Diego 4,628
San Francisco 13,352
Santa Barbara 428
Santa Cruz 504
Lawrence Berkeley 376
Lawrence Livermore 272
Los Alamos 0
MELWEB 2,091,562
Searchlight 42,006
Other - UC 1,994
Other-Network UC 3,543
_____
2,177,919
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 3.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 1.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:31
Average session length (minutes:seconds) 19:43
Longest session recorded (minutes:seconds) 234:45
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 316.6
Retrievals per search - standard deviation 3209.3
Percent of searches completed with 0 results 32.2%
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 64,509 13.2%
PRESENT 395,237 81.0%
INIT or CLOSE 27,818 5.7%
OTHER 555 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 4,492 4.9% 1,672 37.2% 3 752.8 3518.1
PERSONAL AUTHOR 22,090 24.1% 6,030 27.3% 7 71.2 570.1
TITLE WORD 6,872 7.5% 2,566 37.3% 4 142.8 1770.6
SUBSET 123 0.1% 27 21.9% 37 235.9 786.0
SUBJECT WORD 242 0.3% 105 43.4% 7 625.9 3144.8
SUBJECT 1,768 1.9% 946 53.5% 17 469.3 2387.0
EXACT SUBJECT 3,279 3.6% 797 24.3% 30 388.3 2113.8
MAJOR SUBJECT 113 0.1% 54 47.8% 23 796.9 3684.3
EXACT MAJOR SUBJ 387 0.4% 89 23.0% 24 290.9 1263.7
EXACT TITLE 568 0.6% 304 53.5% 1 10.2 95.8
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,096 1.2% 421 38.4% 154 1363.0 3080.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 28 0.0% 14 50.0% 5 12.6 22.7
KEYWORD 35,983 39.3% 11,952 33.2% 16 621.2 4933.6
DATE 2,666 2.9% 643 24.1% 4 60.8 380.0
LANGUAGE 4,473 4.9% 1,180 26.4% 27 346.4 2145.9
UNIQUE ID 225 0.2% 84 37.3% 1 1.5 2.1
ADDED 1,148 1.3% 743 64.7% 7 18.9 33.0
PUB TYPE 1,926 2.1% 408 21.2% 23 174.2 1176.8
AUTHOR AFFIL. 653 0.7% 289 44.3% 9 174.7 1269.2
CHEMICAL NAME 7 0.0% 7 100% 0 0.0 0.0
EXACT CHEMICAL 1 0.0% 0 0.0% 5 5.0 0.0
AT 2,972 3.2% 857 28.8% 23 492.7 3139.4
AGE 194 0.2% 50 25.8% 23 123.8 375.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 80 0.1% 30 37.5% 63 290.7 870.0
XXS 165 0.2% 88 53.3% 12 50.1 94.3
XMXS 95 0.1% 44 46.3% 15 131.5 488.4
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% 7 100% 0 0.0 0.0
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 18,863 29.2% 6,265 33.2% 6 192.5 1629.3
Single 45,646 70.8% 14,485 31.7% 16 577.7 4484.1
PRESENT commands, by type:
MARC 32.3%
OPAC 29.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS