MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/02/00 through 09/08/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 35,486 1,892,791
MED90 7,286 152,018
MED85 5,119 57,400
MED80 4,512 29,033
MED75 4,224 47,621
MED66 4,252 37,348
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,614 41,356
2-4 a.m. 710 15,563
4-6 a.m. 283 12,883
6-8 a.m. 938 26,962
8-10 a.m. 4,371 168,482
10-12 a.m. 10,873 381,808
12-2 p.m. 10,441 361,592
2-4 p.m. 12,481 452,000
4-6 p.m. 10,156 381,122
6-8 p.m. 4,473 202,085
8-10 p.m. 2,831 108,582
10-12 p.m. 1,708 63,776
__________ _____________ _________________
Total: 60,879 2,216,211
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 378
Davis 492
Irvine 43
Los Angeles 475
Riverside 20
San Diego 491
San Francisco 1,302
Santa Barbara 23
Santa Cruz 12
Lawrence Berkeley 31
Lawrence Livermore 23
Los Alamos 0
MELWEB 50,342
Searchlight 6,880
Other - UC 33
Other-Network UC 334
_____
60,879
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,551
Davis 3,378
Irvine 251
Los Angeles 3,866
Riverside 47
San Diego 4,626
San Francisco 17,278
Santa Barbara 200
Santa Cruz 187
Lawrence Berkeley 58
Lawrence Livermore 620
Los Alamos 0
MELWEB 2,136,659
Searchlight 31,774
Other - UC 21
Other-Network UC 14,695
_____
2,216,211
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 3.3
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:28
Average session length (minutes:seconds) 19:48
Longest session recorded (minutes:seconds) 234:25
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 347.5
Retrievals per search - standard deviation 4367.6
Percent of searches completed with 0 results 31.6%
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 60,879 12.4%
PRESENT 403,644 82.2%
INIT or CLOSE 25,550 5.2%
OTHER 766 0.2%
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 4,016 4.6% 1,461 36.4% 4 641.7 3835.9
PERSONAL AUTHOR 19,709 22.7% 5,420 27.5% 7 77.3 680.7
TITLE WORD 6,441 7.4% 2,331 36.2% 3 184.3 2007.6
SUBSET 158 0.2% 45 28.5% 32 183.9 565.4
SUBJECT WORD 134 0.2% 68 50.7% 5 1190.2 5306.1
SUBJECT 2,101 2.4% 1,153 54.9% 20 395.5 2074.8
EXACT SUBJECT 3,472 4.0% 802 23.1% 34 388.6 1927.0
MAJOR SUBJECT 177 0.2% 59 33.3% 18 455.1 1185.0
EXACT MAJOR SUBJ 400 0.5% 87 21.7% 25 209.1 570.6
EXACT TITLE 595 0.7% 272 45.7% 1 6.6 42.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,002 1.2% 382 38.1% 296 1705.0 3247.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 35 0.0% 17 48.6% 3 138.1 250.1
KEYWORD 34,618 39.9% 11,279 32.6% 16 686.5 6810.3
DATE 1,527 1.8% 381 24.9% 3 85.3 416.5
LANGUAGE 4,494 5.2% 1,143 25.4% 25 332.8 2562.4
UNIQUE ID 153 0.2% 21 13.7% 1 1.0 0.1
ADDED 1,226 1.4% 656 53.5% 4 13.3 22.7
PUB TYPE 2,130 2.5% 477 22.4% 25 145.5 471.9
AUTHOR AFFIL. 718 0.8% 301 41.9% 4 55.5 626.8
CHEMICAL NAME 12 0.0% 10 83.3% 2 1.5 0.7
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 2,958 3.4% 994 33.6% 21 602.0 4219.3
AGE 207 0.2% 31 15.0% 30 92.0 150.1
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 74 0.1% 25 33.8% 37 100.9 159.8
XXS 229 0.3% 122 53.3% 16 585.2 3559.8
XMXS 86 0.1% 27 31.4% 24 519.6 1896.3
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 4 0.0% 1 25.0% 27 52.0 64.3
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 17,607 28.9% 5,848 33.2% 6 224.5 2231.3
Single 43,272 71.1% 13,410 31.0% 16 620.1 6064.0
PRESENT commands, by type:
MARC 32.6%
OPAC 28.9%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS