MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/01/99 through 08/31/99
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 153,195 8,839,668
MED90 32,447 933,693
MED85 20,506 351,045
MED80 15,922 167,177
MED75 13,871 102,945
MED66 13,845 115,339
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 3,393 106,808
2-4 a.m. 3,064 73,333
4-6 a.m. 816 21,478
6-8 a.m. 2,860 107,106
8-10 a.m. 20,366 839,250
10-12 a.m. 43,100 1,759,662
12-2 p.m. 43,758 1,796,657
2-4 p.m. 54,654 2,348,592
4-6 p.m. 42,252 1,803,763
6-8 p.m. 18,319 846,060
8-10 p.m. 10,552 495,589
10-12 p.m. 6,652 311,569
__________ _____________ _________________
Total: 249,786 10,509,867
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,950
Davis 2,189
Irvine 970
Los Angeles 3,159
Riverside 192
San Diego 9,017
San Francisco 5,192
Santa Barbara 132
Santa Cruz 363
Lawrence Berkeley 754
Lawrence Livermore 75
Los Alamos 0
MELWEB 222,502
Other - UC 427
Other-Network UC 2,864
_____
249,786
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 18,334
Davis 26,761
Irvine 9,039
Los Angeles 36,613
Riverside 1,704
San Diego 29,050
San Francisco 61,688
Santa Barbara 1,951
Santa Cruz 1,845
Lawrence Berkeley 5,040
Lawrence Livermore 478
Los Alamos 0
MELWEB 10,282,241
Other - UC 3,395
Other-Network UC 31,728
_____
10,509,867
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 17840
Standard deviation in seconds 7.49E6
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 1.2
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 22:51
Average session length (minutes:seconds) 24:46
Longest session recorded (minutes:seconds) 364:09
Average number of searches completed per session 0.0
Retrievals per search - median 4.0
Retrievals per search - average 345.3
Retrievals per search - standard deviation 4145.8
Percent of searches completed with 0 results 29.0%
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 249,786 11.4%
PRESENT 1,858,360 84.7%
INIT or CLOSE 85,620 3.9%
OTHER 812 0.0%
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 18,209 4.9% 7,476 41.1% 4 696.3 4949.8
PERSONAL AUTHOR 86,770 23.5% 23,860 27.5% 7 79.2 934.3
TITLE WORD 27,890 7.5% 10,210 36.6% 3 176.3 1946.1
SUBSET 764 0.2% 153 20.0% 24 204.3 1137.3
SUBJECT WORD 2,152 0.6% 1,216 56.5% 14 1087.2 8502.4
SUBJECT 8,439 2.3% 4,171 49.4% 23 523.4 3255.3
EXACT SUBJECT 17,967 4.9% 4,588 25.5% 29 446.4 2805.0
MAJOR SUBJECT 685 0.2% 289 42.2% 25 1114.6 6366.7
EXACT MAJOR SUBJ 1,404 0.4% 228 16.2% 25 230.4 673.7
EXACT TITLE 2,369 0.6% 1,375 58.0% 1 31.3 259.6
TREE NUMBER 1 0.0% 0 0.0% 8 8.0 0.0
EXACT JOURNAL 4,012 1.1% 1,198 29.9% 69 1098.6 2513.2
MAJOR TREE NUM 2 0.0% 1 50.0% 315 315.0 0.0
CAS 229 0.1% 90 39.3% 13 214.4 1397.0
KEYWORD 134069 36.3% 37,781 28.2% 20 661.0 6253.3
DATE 7,510 2.0% 1,748 23.3% 5 82.0 576.0
LANGUAGE 23,752 6.4% 6,752 28.4% 26 433.5 3769.6
UNIQUE ID 729 0.2% 206 28.3% 1 1.1 0.8
ADDED 1,676 0.5% 828 49.4% 6 53.6 1097.9
PUB TYPE 11,360 3.1% 3,060 26.9% 20 118.6 540.7
AUTHOR AFFIL. 2,351 0.6% 1,006 42.8% 7 116.5 1091.7
CHEMICAL NAME 32 0.0% 23 71.9% 49 92.6 123.0
EXACT CHEMICAL 11 0.0% 10 90.9% 26 26.0 0.0
AT 14,714 4.0% 4,398 29.9% 21 431.0 3223.0
AGE 883 0.2% 202 22.9% 26 196.2 904.1
ISN 3 0.0% 3 100% 0 0.0 0.0
ARTICLE 374 0.1% 73 19.5% 39 418.4 1939.5
XXS 916 0.2% 386 42.1% 18 874.1 6111.9
XMXS 414 0.1% 182 44.0% 9 244.9 1357.1
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 44 0.0% 28 63.6% 21 40.7 46.8
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 77,438 31.0% 25,849 33.4% 8 265.1 2691.6
Single 172,348 69.0% 46,537 27.0% 16 576.9 5570.4
PRESENT commands, by type:
MARC 35.3%
OPAC 26.4%