MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/11/01 through 08/17/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 41,540 2,268,466
MED90 8,003 138,807
MED85 5,845 67,658
MED80 5,138 33,001
MED75 4,815 22,971
MED66 4,849 24,586
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,413 55,221
2-4 a.m. 1,008 44,968
4-6 a.m. 230 15,624
6-8 a.m. 1,106 47,611
8-10 a.m. 5,713 208,543
10-12 a.m. 13,382 451,948
12-2 p.m. 12,062 426,811
2-4 p.m. 14,860 562,671
4-6 p.m. 10,683 388,764
6-8 p.m. 5,488 174,876
8-10 p.m. 2,505 114,420
10-12 p.m. 1,740 64,032
__________ _____________ _________________
Total: 70,190 2,555,489
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 251
Davis 1,080
Irvine 442
Los Angeles 1,317
Riverside 70
San Diego 618
San Francisco 915
Santa Barbara 24
Santa Cruz 110
Lawrence Berkeley 90
Lawrence Livermore 24
Los Alamos 0
MELWEB 5
Searchlight 3,310
Other - UC 61,538
Other-Network UC 396
_____
70,190
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,261
Davis 18,293
Irvine 2,065
Los Angeles 14,494
Riverside 263
San Diego 6,564
San Francisco 33,453
Santa Barbara 145
Santa Cruz 3,141
Lawrence Berkeley 429
Lawrence Livermore 1,051
Los Alamos 0
MELWEB 599
Searchlight 0
Other - UC 2,466,886
Other-Network UC 4,845
_____
2,555,489
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 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:53
Average session length (minutes:seconds) 21:41
Longest session recorded (minutes:seconds) 296:21
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 358.6
Retrievals per search - standard deviation 5097.6
Percent of searches completed with 0 results 32.4%
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 70,190 12.0%
PRESENT 487,029 83.2%
INIT or CLOSE 27,748 4.7%
OTHER 186 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 4,717 4.7% 1,839 39.0% 4 774.2 3938.0
PERSONAL AUTHOR 23,986 24.1% 7,582 31.6% 7 91.8 799.8
TITLE WORD 10,711 10.8% 4,580 42.8% 2 172.4 2226.1
SUBSET 187 0.2% 51 27.3% 30 197.5 611.1
SUBJECT WORD 122 0.1% 53 43.4% 5 6540.8 26551.5
SUBJECT 1,523 1.5% 682 44.8% 16 210.4 1287.9
EXACT SUBJECT 3,559 3.6% 817 23.0% 34 533.9 3194.6
MAJOR SUBJECT 145 0.1% 40 27.6% 9 299.7 1638.5
EXACT MAJOR SUBJ 403 0.4% 56 13.9% 12 168.6 523.0
EXACT TITLE 610 0.6% 325 53.3% 1 15.8 96.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,004 1.0% 235 23.4% 565 2006.1 4139.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 8 0.0% 7 87.5% 4 4.0 0.0
KEYWORD 37,858 38.1% 12,271 32.4% 15 668.7 6456.8
DATE 1,985 2.0% 434 21.9% 5 169.7 1939.9
LANGUAGE 4,551 4.6% 1,077 23.7% 26 318.7 2045.2
UNIQUE ID 310 0.3% 133 42.9% 1 1.2 0.6
ADDED 1,221 1.2% 459 37.6% 7 22.3 39.4
PUB TYPE 2,529 2.5% 615 24.3% 25 165.5 1268.7
AUTHOR AFFIL. 658 0.7% 314 47.7% 11 63.0 412.2
CHEMICAL NAME 9 0.0% 6 66.7% 991 3171.3 4659.3
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,582 2.6% 743 28.8% 24 388.3 1796.3
AGE 113 0.1% 24 21.2% 31 327.9 907.6
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 174 0.2% 42 24.1% 26 196.0 671.1
XXS 307 0.3% 117 38.1% 9 4136.5 56120.0
XMXS 58 0.1% 14 24.1% 7 77.1 199.4
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 22 0.0% 20 90.9% 2 1.5 0.7
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 20,752 29.6% 7,400 35.7% 6 180.5 1712.1
Single 49,438 70.4% 15,339 31.0% 14 667.5 7221.4
PRESENT commands, by type:
MARC 28.2%
OPAC 36.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS